Как найти mac адрес на cisco

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show arp | include 10fe.ed58.0555

sh ip arp 192.168.1.22
sh ip arp 01ac:bc11:1100
sh ip arp vlan 100

show mac address-table vlan 100

show mac-address-table address 20cf.30bd.d1fe

sh mac-address-table duplicate only

clear ip arp 192.168.1.5
clear mac-address-table dynamic address 6872.5104.aaaa
clear arp-cache

Как найти порт коммутатора, к которому подключен хост

Январь 13, 2015

Table Of Contents

Cisco NX-OS Layer 2 Commands

clear mac address-table dynamic

clear spanning-tree counters

clear spanning-tree detected-protocol

clear vlan counters

clear vtp counters

feature private-vlan

feature vtp

instance vlan

mac-address

mac address-table aging-time

mac address-table static

media ethernet

name (VLAN configuration)

name (mst configuration)

private-vlan

private-vlan association

private-vlan mapping

private-vlan synchronize

revision

show forwarding consistency l2

show hardware mac address-table

show interface mac-address

show interface private-vlan mapping

show interface pruning

show interface switchport

show interface trunk

show interface vlan

show interface vlan counters

show mac address-table

show mac address-table aging-time

show running-config spanning-tree

show running-config vlan

show running-config vtp

show spanning-tree

show spanning-tree active

show spanning-tree bridge

show spanning-tree brief

show spanning-tree detail

show spanning-tree interface

show spanning-tree mst

show spanning-tree root

show spanning-tree summary

show spanning-tree vlan

show startup-config vlan

show startup-config vtp

show system vlan reserved

show vlan

show vlan counters

show vlan dot1q tag native

show vlan id

show vlan private-vlan

show vtp counter

show vtp interface

show vtp password

show vtp status

shutdown (VLAN configuration)

spanning-tree bpdufilter

spanning-tree bpduguard

spanning-tree bridge assurance

spanning-tree cost

spanning-tree guard

spanning-tree link-type

spanning-tree loopguard default

spanning-tree mode

spanning-tree mst configuration

spanning-tree mst cost

spanning-tree mst forward-time

spanning-tree mst hello-time

spanning-tree mst max-age

spanning-tree mst max-hops

spanning-tree mst port-priority

spanning-tree mst pre-standard

spanning-tree mst priority

spanning-tree mst root

spanning-tree mst simulate pvst

spanning-tree mst simulate pvst global

spanning-tree pathcost method

spanning-tree port type edge

spanning-tree port type edge bpdufilter default

spanning-tree port type edge bpduguard default

spanning-tree port type edge default

spanning-tree port type network

spanning-tree port type network default

spanning-tree port-priority

spanning-tree vlan

state

switchport mode private-vlan host

switchport mode private-vlan promiscuous

switchport mode private-vlan promiscuous trunk

switchport mode private-vlan trunk secondary

switchport private-vlan association trunk

switchport private-vlan host-association

switchport private-vlan mapping trunk

switchport private-vlan trunk allowed vlan

switchport private-vlan trunk native vlan

switchport trunk pruning vlan

system vlan reserve

vlan (global configuration mode)

vlan configuration

vtp domain

vtp file

vtp mode

vtp mode transparent

vtp password

vtp pruning

vtp version

Cisco NX-OS Layer 2 Commands

This chapter describes the Cisco NX-OS Layer 2 commands.

clear mac address-table dynamic

To clear the dynamic address entries from the MAC address table in Layer 2, use the clear mac address-table dynamic command.

clear mac address-table dynamic [[address mac_addr] [vlan vlan_id] [interface {type slot/port | port-channel number}]

Syntax Description

Defaults

None

Command Modes

Any command mode

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

Use the clear mac address-table dynamic command with no arguments to remove all dynamic entries from the table.

To clear static MAC addresses from the table, use the no mac address-table static command in configuration mode.

If the clear mac address-table dynamic command is entered with no options, all dynamic addresses are removed. If you specify an address but do not specify an interface, the address is deleted from all interfaces. If you specify an interface but do not specify an address, the device removes all addresses on the specified interfaces.

This command does not require a license.

Examples

This example shows how to clear all the dynamic Layer 2 entries from the MAC address table:

switch(config)# clear mac address-table dynamic 

This example shows how to clear all the dynamic Layer 2 entries from the MAC address table for VLAN 20 on port 2/20:

switch(config)# clear mac address-table dynamic vlan 20 interface ethernet 2/20

Related Commands

clear spanning-tree counters

To clear the counters for the Spanning Tree Protocol (STP), use the clear spanning-tree counters command.

clear spanning-tree counters [vlan vlan-id] [interface {ethernet {interface-num} | port-channel {channel-num}}]

Syntax Description

Defaults

None

Command Modes

Any command mode

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

You can clear all the STP counters on the entire device, per VLAN, or per interface.

This command does not require a license.

Examples

This example shows how to clear the STP counters for VLAN 5:

switch# clear spanning-tree counters vlan 5

Related Commands

clear spanning-tree detected-protocol

To restart the protocol migration, use the clear spanning-tree detected-protocol command.

clear spanning-tree detected-protocol [interface {ethernet {interface-num} | port-channel {channel-num}}]

Syntax Description

Defaults

None

Command Modes

Any command mode

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

Rapid per VLAN Spanning Tree Plus (Rapid PVST+) and Multiple Spanning Tree (MST) have built-in compatibility mechanisms that allow them to interact properly with other versions of IEEE spanning tree or other regions. For example, a bridge running Rapid PVST+ can send 802.1D bridge protocol data units (BPDUs) on one of its ports when it is connected to a legacy bridge. An MST bridge can detect that a port is at the boundary of a region when it receives a legacy BPDU or an MST BPDU that is associated with a different region.

These mechanisms are not always able to revert to the most efficient mode. For example, a Rapid PVST+ bridge that is designated for a legacy 802.1D bridge stays in 802.1D mode even after the legacy bridge has been removed from the link. Similarly, an MST port assumes that it is a boundary port when the bridges to which it is connected have joined the same region.

To force the MST port to renegotiate with the neighbors, enter the clear spanning-tree detected-protocol command.

If you enter the clear spanning-tree detected-protocol command with no arguments, the command is applied to every port of the device.

This command does not require a license.

Examples

This example shows how to restart the protocol migration on a specific interface:

switch# clear spanning-tree detected-protocol interface gigabitethernet5/8

Related Commands

clear vlan counters

To clear the counters for a specified VLAN or all VLANs, use the clear vlan counters command.

clear vlan [id {vlan-id}] counters

Syntax Description

Defaults

None

Command Modes

Any command mode

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

If you do not specify a VLAN ID, the system clears the counters for all the VLANs, including private VLANs.

This command does not require a license.

Examples

This example shows how to clear the counters for VLAN 50:

switch# clear vlan 50 counters

Related Commands

clear vtp counters

To clear the Virtual Trunking Protocol (VTP) counters, use the clear vtp counters command.

clear vtp counters

Syntax Description

This command has no arguments or keywords.

Defaults

None

Command Modes

Any command mode

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

This command does not require a license.

Examples

This example shows how to clear the VTP counters:

switch# clear vtp counters

Related Commands

feature private-vlan

To enable private VLANs, use the feature private-vlan command. To return to the default settings, use the no form of this command.

feature private-vlan

no feature private-vlan

Syntax Description

This command has no arguments or keywords.

Defaults

Disabled

Command Modes

Global configuration

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

You must use this command to enable private VLAN functionality. You must enable private VLANs before the private VLANs are visible to the user. When private VLANs are disabled, all of the configuration on the feature is removed from the interfaces.

You cannot apply the no feature private-vlan command if the device has any operational ports in private VLAN mode. You must shut down all operational ports in private VLAN mode before you use the no feature private-vlan command. After you shut down the interfaces and enter the no feature private-vlan command, these ports return to the default mode.

This command does not require a license.

Examples

This example shows how to enable private VLAN functionality on the device:

switch(config)# feature private-vlan

Related Commands

feature vtp

To enable VTPs, use the feature vtp command. To return to the default setting, use the no form of this command.

feature vtp

no feature vtp

Syntax Description

This command has no arguments or keywords.

Defaults

Disabled

Command Modes

Global configuration

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

You must use this command to enable private VTP functionality. You must enable private VTP before you can configure or use any of the functionality.

Note When you disable the VTP feature, all of the VTP configurations are lost.

This command does not require a license.

Examples

This example shows how to enable VTP functionality on the device:

switch(config)# feature vtp

Related Commands

instance vlan

To map a VLAN or a set of VLANs to a Multiple Spanning Tree instance (MSTI), use the instance vlan command. To delete the instance and return the VLANs to the default instance (CIST), use the no form of this command.

instance instance-id vlan vlan-id

no instance instance-id vlan vlan-id

Syntax Description5

Defaults

No VLANs are mapped to any MST instance (all VLANs are mapped to the CIST instance).

Command Modes

MST configuration submode

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

The vlans vlan-range is entered as a single value or a range.

You cannot map VLANs 3968 to 4047 or 4094 to an MST instance. These VLANs are reserved for internal use by the device.

The mapping is incremental, not absolute. When you enter a range of VLANs, this range is added to or removed from the existing instances.

Any unmapped VLAN is mapped to the CIST instance.

Caution
When you change the VLAN-to-MSTI mapping, the system restarts MST.

This command does not require a license.

Examples

This example shows how to map a range of VLANs to MSTI 4:

switch(config)# spanning-tree mst configuration

switch(config-mst)# instance 4 vlan 100-200

Related Commands

mac-address

To configure a static MAC address for a Layer 3 interface, use the mac address command. To return to the default settings, use the no form of this command.

mac-address mac-address

no mac-address mac-address

Syntax Description

Defaults

VDC MAC address

Command Modes

Interface configuration

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

You can specify a MAC address for all Layer 3 interfaces:

•Layer 3 interfaces

•Layer 3 port channels

•Layer 3 subinterfaces

•VLAN network interface

You cannot configure static MAC addresses on tunnel interfaces.

You cannot use this command on Layer 2 interfaces or individual members of a port channel.

See the Cisco Nexus 7000 Series NX-OS Interfaces Command Reference for information on configuring Layer 3 interfaces.

You cannot configure a static group MAC address to these interfaces.

This command does not require a license.

Examples

This example shows how to configure a static MAC address on a Layer 3 interface:

switch(config)# interface ethernet 7/3

switch(config-1f)# mac-address 02c4.1e42.a3b2

Related Commands

mac address-table aging-time

To configure the aging time for entries in the Layer 2 table, use the mac address-table aging-time command. To return to the default settings, use the no form of this command.

mac address-table aging-time seconds [vlan vlan_id]

no mac address-table aging-time [vlan vlan_id]

Syntax Description

Defaults

1800 seconds

Command Modes

Global configuration

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

Enter 0 seconds to disable the aging process.

The age value may be rounded off to the nearest multiple of 5 seconds. If the system rounds the value to a different value from that specified by the user (from the rounding process), the system returns an informational message.

When you use this command in the global configuration mode, the age values of all VLANs for which a configuration has not been specified are modified and those VLANs with specifically modified aging times are not modified. When you use the no form of this command without the VLAN parameter, only those VLANs that have not been specifically configured for the aging time reset to the default value. Those VLANs with specifically modified aging times are not modified.

When you use this command and specify a VLAN, the aging time for only that specified VLAN is modified. When you use the no form of this command and specify a VLAN, the aging time for the VLAN is returned to the current global configuration for the aging time, which might or might not be the default value of 300 seconds depending if the global configuration of the device for the aging time has been changed.

The aging time is counted from the last time that the switch detected the MAC address.

This command does not require a license.

Examples

This example shows how to change the length of time an entry remains in the MAC address table to 500 seconds for the entire device:

switch(config)# mac address-table aging-time 500

Related Commands

mac address-table static

To configure a static entry for the Layer 2 MAC address table, use the mac address-table static command. To delete the static entry, use the no form of this command.

mac address-table static mac-address vlan vlan-id {[drop | interface {type slot/port | port-channel number]}

no mac address-table static {address mac_addr} {vlan vlan_id}

Syntax Description

Defaults

None

Command Modes

Global configuration

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

You cannot apply the mac address-table static mac-address vlan vlan-id drop command to a multicast MAC address.

The output interface specified cannot be a VLAN interface or a Switched Virtual Interface (SVI).

Use the no form to remove entries that are profiled by the combination of specified entry information.

This command does not require a license.

Examples

This example shows how to add a static entry to the MAC address table:

switch(config)# mac address-table static 0050.3e8d.6400 vlan 3 interface ethernet 2/1

Related Commands

media ethernet

Note The Cisco NX-OS software supports only Ethernet VLANs on the DC-OS. Although the media ethernet command appears on the device, it does not apply to any configuration.

To set the media type for a VLAN to Ethernet, use the media ethernet command. Use the no form of this command to return to the default value.

media ethernet

no media

Syntax Description

This command has no arguments or keywords.

Defaults

Ethernet is the only media type supported.

Command Modes

VLAN configuration submode

Supported User Roles

network-admin

vdc-admin

Usage Guidelines

The media ethernet command is not supported in Release 4.0.

This command does not require a license.

Examples

This example shows how to set the media type to Ethernet for VLAN 2:

switch(config-vlan)# media ethernet

Related Commands

name (VLAN configuration)

To set the name for a VLAN, use the name command. To remove the user-configured name from a VLAN, use the no form of this command.

name vlan-name

no name

Syntax Description

Defaults

The vlan-name argument is VLANxxxx where xxxx represents four numeric digits (including leading zeroes) equal to the VLAN ID number.

Command Modes

VLAN configuration submode

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

The name must be unique within the VDC, and the same name can be reused in a separate VDC.

You cannot change the name for the default VLAN, VLAN 1, or for the internally allocated VLANs.

This command does not require a license.

Examples

This example shows how to name VLAN 2:

switch(config-vlan)# name accounting

Related Commands

name (mst configuration)

To set the name of a Multiple Spanning Tree (MST) region, use the name command. To return to the default name, use the no form of this command.

name name

no name name

Syntax Description

Defaults

None

Command Modes

MST configuration submode

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

Two or more devices with the same VLAN mapping and configuration version number are considered to be in different MST regions if the region names are different.

Caution
Be careful when using the
name command to set the name of an MST region. If you make a mistake, you can put the device in a different region. The configuration name is a case-sensitive parameter.

This command does not require a license.

Examples

This example shows how to name a region:

switch(config)# spanning-tree mst configuration

switch(config-mst)# name accounting

Related Commands

private-vlan

To configure private VLANs, use the private-vlan command. To return the specified VLAN(s) to normal VLAN mode, use the no form of this command.

private-vlan {isolated | community | primary}

no private-vlan association

Syntax Description

Defaults

None

Command Modes

VLAN configuration submode

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

You must enable private VLANs by using the feature private-vlan command before you can configure private VLANs. The commands for configuring private VLANs are not visible until you enable private VLANs.

Note Before you configure a VLAN as a secondary VLAN, either community or isolated, you must shut down the VLAN interface, or Switched Virtual Interface (SVI), for that VLAN.

If you delete either the primary or secondary VLAN, the ports that are associated with the VLAN become inactive. When you enter the no private-vlan command, the VLAN returns to the normal VLAN mode. All primary and secondary associations on that VLAN are suspended, but the interfaces remain in private VLAN mode. However, when you reconvert the specified VLAN to private VLAN mode, the original associations are reinstated.

If you enter the no vlan command for the primary VLAN, all private VLAN associations with that VLAN are lost. However, if you enter the no vlan command for a secondary VLAN, the private VLAN associations with that VLAN are suspended and return when you recreate the specified VLAN and configure it as the previous secondary VLAN.

You cannot configure VLAN1 or the internally allocated VLANs as private VLANs.

A private VLAN is a set of private ports that are characterized by using a common set of VLAN number pairs. Each pair is made up of at least two special unidirectional VLANs and is used by isolated ports and/or by a community of ports to communicate with routers.

An isolated VLAN is a VLAN that is used by isolated ports to communicate with promiscuous ports. An isolated VLAN’s traffic is blocked on all other private ports in the same VLAN. Its traffic can only be received by standard trunking ports and promiscuous ports that are assigned to the corresponding primary VLAN.

A promiscuous port is defined as a private port that is assigned to a primary VLAN.

A community VLAN is defined as the VLAN that carries the traffic among community ports and from community ports to the promiscuous ports on the corresponding primary VLAN.

A primary VLAN is defined as the VLAN that is used to convey the traffic from the routers to customer end stations on private ports.

Multiple community and isolated VLANs are allowed. If you enter a range of primary VLANs, the system uses the first number in the range for the association.

This command does not require a license.

Examples

This example shows how to remove a private VLAN relationship from the primary VLAN. The associated secondary VLANs are not deleted.

switch(config-vlan)# no private-vlan association

Related Commands

private-vlan association

To configure the association between a primary VLAN and a secondary VLAN on a private VLAN, use the private-vlan association command. To remove the association, use the no form of this command.

private-vlan association {[add] secondary-vlan-list | remove secondary-vlan-list}

no private-vlan association

Syntax Description

Defaults

None

Command Modes

VLAN configuration submode

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

You must enable private VLANs by using the feature private-vlan command before you can configure private VLANs. The commands for configuring private VLANs are not visible until you enable private VLANs.

Note Before you configure a VLAN as a secondary VLAN, either community or isolated, you must shut down the VLAN interface, or switched virtual interface (SVI), for that VLAN.

If you delete either the primary or secondary VLAN, the ports that are associated with the VLAN become inactive. When you enter the no private-vlan command, the VLAN returns to the normal VLAN mode. All primary and secondary associations on that VLAN are suspended, but the interfaces remain in private VLAN mode. However, when you reconvert the specified VLAN to private VLAN mode, the original associations are reinstated.

If you enter the no vlan command for the primary VLAN, all private VLAN associations with that VLAN are lost. However, if you enter the no vlan command for a secondary VLAN, the private VLAN associations with that VLAN are suspended and return when you recreate the specified VLAN and configure it as the previous secondary VLAN.

The secondary-vlan-list argument cannot contain spaces. It can contain multiple comma-separated items. Each item can be a single secondary VLAN ID or a hyphenated range of secondary VLAN IDs. The secondary-vlan-list parameter can contain multiple secondary VLAN IDs.

A private VLAN is a set of private ports that are characterized by using a common set of VLAN number pairs. Each pair is made up of at least two special unidirectional VLANs and is used by isolated ports and/or by a community of ports to communicate with routers.

Multiple community and isolated VLANs are allowed. If you enter a range of primary VLANs, the system uses the first number in the range for the association.

Isolated and community VLANs can only be associated with one primary VLAN. You cannot configure a VLAN that is already associated to a primary VLAN as a primary VLAN.

This command does not require a license.

Examples

This example shows how to create a private VLAN relationship between the primary VLAN 14, the isolated VLAN 19, and the community VLANs 20 and 21:

switch(config-vlan)# private-vlan isolated

switch(config-vlan)# private-vlan community

switch(config-vlan)# private-vlan community

switch(config-vlan)# private-vlan primary

switch(config-vlan)# private-vlan association 19-21

This example shows how to remove isolated VLAN 18 and community VLAN 20 from the private VLAN association:

switch(config-vlan)# private-vlan association remove 18,20

Related Commands

private-vlan mapping

To create a mapping between the primary and the secondary VLANs so that both VLANs share the same Layer 3 VLAN interface, or switched virtual interface (SVI), use the private-vlan mapping command under the SVI. To remove all private VLAN mappings from the Layer 3 VLAN interface, use the no form of this command.

private-vlan mapping {[add] secondary-vlan-list | remove secondary-vlan-list}

no private-vlan mapping

Syntax Description

Defaults

None

Command Modes

Interface configuration

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

You must enable private VLANs by using the feature private-vlan command before you can configure private VLANs. The commands for configuring private VLANs are not visible until you enable private VLANs.

The private-vlan mapping command is valid in the interface configuration mode of the primary VLAN.

The secondary-vlan-list argument cannot contain spaces. It can contain multiple comma-separated items. Each item can be a single secondary VLAN ID or a hyphenated range of secondary VLAN IDs.

Note You must enable VLAN interfaces, or SVIs, before you can configure the SVI. Use the feature interface-vlan command to enable VLAN interfaces.
See the Cisco Nexus 7000 Series NX-OS Interfaces Configuration Guide, Release 5.x, for information on creating and configuring VLAN interfaces.

Traffic that is received on the secondary VLAN is routed by the SVI of the primary VLAN.

When you configure VLANs as secondary private VLANs, the SVIs of those existing VLANs do not function and are considered as down after you enter this command.

You can map a secondary VLAN to only one primary SVI. If you configure the primary VLAN as a secondary VLAN, all the mappings that are specified in this command are suspended.

You must first associate all secondary VLANs with the primary VLAN using the private-vlan command. If you configure a mapping between two VLANs that do not have a valid Layer 2 association, the mapping configuration does not take effect.

See the private-vlan command for more information about primary and secondary VLANs.

This command does not require a license.

Examples

This example shows how to map the interface of VLAN 20 to the Layer 3 VLAN interface, or SVI, of VLAN 18:

switch(config)# interface vlan 18

switch(config-if)# private-vlan mapping 20

This example shows how to permit routing of secondary VLAN-ingress traffic from private VLANs 303 through 307, 309, and 440:

switch# configure terminal 

switch(config)# interface vlan 202 

switch(config-if)# private-vlan mapping add 303-307,309,440 

This example shows how to remove all private VLAN mappings from the SVI of VLAN 19:

switch(config)# interface vlan 19

switch(config-if)# no private-vlan mapping

switch(config-if)#

Related Commands

private-vlan synchronize

To map the secondary VLANs to the same MST instance as the primary VLAN, use the private-vlan synchronize command.

private-vlan synchronize

Syntax Description

This command has no keywords or arguments.

Defaults

This command has no default settings.

Command Modes

MST configuration submode

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

If you do not map secondary VLANs to the same MST instance as the associated primary VLAN when you exit the MST configuration submode, the device displays a warning message that lists the secondary VLANs that are not mapped to the same instance as the associated VLAN. The private-vlan synchronize command automatically maps all secondary VLANs to the same instance as the associated primary VLANs.

This command does not require a license.

Examples

This example assumes that a primary VLAN 2 and a secondary VLAN 3 are associated to VLAN 2, and that all VLANs are mapped to the CIST instance 1. This example also shows the output if you try to change the mapping for the primary VLAN 2 only:

switch(config)# spanning-tree mst configuration 

switch(config-mst)# instance 1 vlan 2

These secondary vlans are not mapped to the same instance as their primary:

This example shows how to initialize PVLAN synchronization:

switch(config-mst)# private-vlan synchronize

Related Commands

revision

To set the revision number for the Multiple Spanning Tree (MST) region configuration, use the revision command. To return to the default settings, use the no form of this command.

revision version

no revision version

Syntax Description

Defaults

0

Command Modes

MST configuration submode

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

Two or more devices with the same VLAN mapping and name are considered to be in different MST regions if the configuration revision numbers are different.

Caution
Be careful when using the
revision command to set the revision number of the MST region configuration because a mistake can put the device in a different region.

This command does not require a license.

Examples

This example shows how to set the revision number of the MST region configuration:

switch(config)# spanning-tree mst configuration

switch(config-mst)# revision 5

Related Commands

show forwarding consistency l2

To display information about discrepant, missing, or extra MAC addresses between the supervisor and the module, use the show forwarding consistency l2 command.

show forwarding consistency l2 {module}

Syntax Description

Defaults

None

Command Modes

Any command mode

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

Optimally, all the MAC address tables on each module exactly match the MAC address table on the supervisor.

This command does not require a license.

Examples

This example shows how to display hardware information about all the MAC addresses VLAN 1 on module 2:

switch# show forwarding consistency l2 9

Legend:         * - primary entry, G - Gateway MAC, (R) - Routed MAC        age - seconds since last seen

Missing entries in the MAC Table   
VLAN       MAC Address       Type        age    Secure  NTFY   Ports 
---------+-----------------+--------+---------+------+------+----------------------------------

G     -    0018.bad7.e115    static       -     False  False   sup-eth1(R)

* 1        0001.1234.5600    static       -     False  False   Eth9/25G 

2          0018.bad7.e115    static       -     False  False   sup-eth1(R)G

3          0018.bad7.e115    static       -     False  False   sup-eth1(R)

Extra and Discrepant entries in the MAC Table

   VLAN     MAC Address      Type      age     Secure  NTFY    Ports 
---------+-----------------+--------+---------+------+------+----------------

G     -     0018.bad7.dc15    static       -     False  False   sup-eth1(R)

* 1         0001.1234.5601    static       -     False  False    Eth9/25

Related Commands

show hardware mac address-table

To display information about the hardware MAC addresses, use the show hardware mac address-table command.

show hardware mac address table {module}

[address {mac-address} {[interface {ethernet slot/port | port-channel channel-number}] [vlan vlan-id]]

[dynamic [address {mac-address}] [interface {ethernet slot/port | port-channel channel-number}] [vlan vlan-id]]

[interface {ethernet slot/port | port-channel channel-number}] [address {mac-address}] [vlan vlan-id]]

[static [address {mac-address}] [interface {ethernet slot/port | port-channel channel-number}] [vlan vlan-id]]

[vlan {vlan-id} [address mac-address] [interface {ethernet slot/port | port-channel channel-number}]

Syntax Description

Defaults

None

Command Modes

Any command mode

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

The fields are as follows:

•Valid—Entry is valid in hardware.

•PI—Primary entry.

•BD—Bridge domain.

•MAC—MAC address.

•Index—Destination index; identifies the port on which the MAC address was learned.

•Static—Statically configured entry. The hardware does not modify this entry. This entry is not be aged by the line card process.

•SW—3-bit software value associated with this entry.

•Modified—MAC address entry that was modified by the hardware since last notification. This value is set when index value changes.

•Age byte—Age timer value when last packet arrived with this entry’s MAC address as the source MAC address.

•Tmr sel—Age timer used for updating the age for this entry. Based on the aging value configured for the VLAN, one of the four timers is used for updating the age.

•GM—Specifies the gateway MAC address or not.

•Secure—Secured MAC address.

•TRAP—When this bit is set, the system drops any packet received with this source MAC address as this entry’s MAC address.

•NTFY—Notify. When the Secured and Notify bits are both set, the system redirects packets to the supervisor when the hardware updates the index value.

•RM—Router MAC address.

•RMA—Router MAC address that is active.

Note The RM and RMA fields are not supported on the Cisco Nexus 7000. Series Switch

•Capture—When this bit is set, any packet sent to this destination is copied by setting the CAP1 bit.

•Fld—Flood bit. When this bit is set, any packet sent to this destination MAC causes the flood bit to be set in the result.

•Always learn—Always learn. When this bit is set, the hardware modifies the index value irrespective of whether this entry is marked static or not.

This command does not require a license.

Examples

This example shows how to display hardware information about all the MAC addresses for VLAN 1 on module 2:

switch# show hardware mac address-table 2 vlan 1

Valid| PI| BD |      MAC      |  Index |Stat| SW| Modi| Age| Tmr| GM| Sec| TR | NT | RM | RMA | Cap|Fld| Always

     |   |    |               |        |  ic|   | fied|Byte| Sel|    |ure| AP | FY |    |     |TURE|   |  Learn

-----+---+----+---------------+--------+----+---+-----+----+----+----+----+---+----+----+-----+----+---+-------

  1    0    1  0100.0cff.fffe  0x00421    1   1    0   152   0     0   0    0    0    0     0   1    0      0

Related Commands

show interface mac-address

To display information about the MAC address and the burned-in MAC address, use the show interface mac-address command.

show interface [type slot/port] mac-address

Syntax Description

Defaults

None

Command Modes

Any command mode

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

If you do not specify the interface, the system displays all the MAC addresses. This command displays both the burned-in MAC address and the configured MAC address.

This command does not require a license.

Examples

This example shows how to display information about all the MAC addresses for the device:

switch# show interface mac-address

-----------------------------------------------------------------------------

Interface                  Mac-Address     Burn-in Mac-Address

-----------------------------------------------------------------------------

mgmt0                      0019.076c.1a78  0019.076c.1a78

Ethernet2/1                0000.0000.0000  0019.076c.4dac

Ethernet2/2                0000.0000.0000  0019.076c.4dad

Ethernet2/3                0000.0000.0000  0019.076c.4dae

Ethernet2/4                0000.0000.0000  0019.076c.4daf

Ethernet2/5                0000.0000.0000  0019.076c.4db0

Ethernet2/6                0000.0000.0000  0019.076c.4db1

Ethernet2/7                0000.0000.0000  0019.076c.4db2

Ethernet2/8                0000.0000.0000  0019.076c.4db3

Ethernet2/9                0000.0000.0000  0019.076c.4db4

Ethernet2/10               0000.0000.0000  0019.076c.4db5

Ethernet2/11               0000.0000.0000  0019.076c.4db6

Ethernet2/12               0000.0000.0000  0019.076c.4db7

Ethernet2/13               0000.0000.0000  0019.076c.4db8

Ethernet2/14               0000.0000.0000  0019.076c.4db9

Ethernet2/15               0000.0000.0000  0019.076c.4dba

Ethernet2/16               0000.0000.0000  0019.076c.4dbb

Ethernet2/17               0000.0000.0000  0019.076c.4dbc

Ethernet2/18               0000.0000.0000  0019.076c.4dbd

Ethernet2/19               0000.0000.0000  0019.076c.4dbe

Ethernet2/20               0000.0000.0000  0019.076c.4dbf

Ethernet2/21               0000.0000.0000  0019.076c.4dc0

Ethernet2/22               0000.0000.0000  0019.076c.4dc1

Ethernet2/23               0000.0000.0000  0019.076c.4dc2

Ethernet2/24               0000.0000.0000  0019.076c.4dc3

Ethernet2/25               0000.0000.0000  0019.076c.4dc4

Ethernet2/26               0000.0000.0000  0019.076c.4dc5

Ethernet2/27               0000.0000.0000  0019.076c.4dc6

Ethernet2/28               0000.0000.0000  0019.076c.4dc7

Ethernet2/29               0000.0000.0000  0019.076c.4dc8

Ethernet2/30               0000.0000.0000  0019.076c.4dc9

Ethernet2/31               0000.0000.0000  0019.076c.4dca

Ethernet2/32               0000.0000.0000  0019.076c.4dcb

Ethernet2/33               0000.0000.0000  0019.076c.4dcc

Ethernet2/34               0000.0000.0000  0019.076c.4dcd

Ethernet2/35               0000.0000.0000  0019.076c.4dce

Ethernet2/36               0000.0000.0000  0019.076c.4dcf

Ethernet2/37               0000.0000.0000  0019.076c.4dd0

Ethernet2/38               0000.0000.0000  0019.076c.4dd1

Ethernet2/39               0000.0000.0000  0019.076c.4dd2

Ethernet2/40               0000.0000.0000  0019.076c.4dd3

Ethernet2/41               0000.0000.0000  0019.076c.4dd4

Ethernet2/42               0000.0000.0000  0019.076c.4dd5

Ethernet2/43               0000.0000.0000  0019.076c.4dd6

Ethernet2/44               0000.0000.0000  0019.076c.4dd7

Ethernet2/45               0000.0000.0000  0019.076c.4dd8

Ethernet2/46               0000.0000.0000  0019.076c.4dd9

Ethernet2/47               0000.0000.0000  0019.076c.4dda

Ethernet2/48               0000.0000.0000  0019.076c.4ddb

port-channel5              0000.0000.0000  0000.0000.0000

port-channel20             0000.0000.0000  0000.0000.0000

port-channel30             0000.0000.0000  0000.0000.0000

port-channel50             0000.0000.0000  0000.0000.0000

Related Commands

show interface private-vlan mapping

To display information about the private VLAN mapping for the primary VLAN interfaces, use the show interface private-vlan mapping command.

show interface private-vlan mapping

Syntax Description

This command has no arguments or keywords.

Defaults

None

Command Modes

Any command mode

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

You can use this command to display the primary and secondary VLAN mapping that allows both VLANs to share the VLAN interface of the primary VLAN.

This command does not require a license.

Examples

This example shows how to display information about the primary and secondary private VLAN mapping:

switch# show interface private-vlan mapping

switch(config)# show interface private-vlan mapping

Interface Secondary VLAN Type

--------- -------------- -----------------

Related Commands

show interface pruning

To display interface trunk Virtual Trunking Protocol (VTP) pruning information, use the show interface pruning command.

show interface pruning

Syntax Description

This command has no keywords or arguments.

Defaults

None

Command Modes

Any command mode

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

This command does not require a license.

Examples

This example shows how to display interface trunk VTP pruning information on the device:

switch# show interface pruning

Port            Vlans pruned for lack of request by neighbor

Port                Vlan traffic requested of neighbor

Related Commands

show interface switchport

To display interface switchport information, use the show interface switchport command.

show interface [if-identifier] switchport

Syntax Description

Defaults

None

Command Modes

Any command mode

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

This command does not require a license.

Examples

This example shows how to display VTP interface switchport information on the device:

switch# show interface switchport

  Switchport Monitor: Not enabled

  Access Mode VLAN: 1 (default)

  Trunking Native Mode VLAN: 1 (default)

  Trunking VLANs Enabled: 1,10,20-30

  Pruning VLANs Enabled: 2-1001

  Administrative private-vlan primary host-association: none

  Administrative private-vlan secondary host-association: none

  Administrative private-vlan primary mapping: none

  Administrative private-vlan secondary mapping: none

  Administrative private-vlan trunk native VLAN: none

  Administrative private-vlan trunk encapsulation: dot1q

  Administrative private-vlan trunk normal VLANs: none

  Administrative private-vlan trunk private VLANs: none

  Operational private-vlan: none

Related Commands

show interface trunk

To display interface trunk information, use the show interface trunk command.

show interface [if-identifier] trunk

Syntax Description

Defaults

None

Command Modes

Any command mode

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

This command does not require a license.

Examples

This example shows how to display VTP interface trunk information on the device:

switch# show interface trunk

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

Port          Vlans Allowed on Trunk

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

Port          Vlans Err-disabled on Trunk

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

Port          VTP in spanning tree forwarding state and not pruned

--------------------------------------------------------------------------------

Related Commands

show interface vlan

To display information about specified VLANs, use the show interface vlan command.

show interface vlan vlan-id [brief | description | private-vlan mapping | status]

Syntax Description

Defaults

None

Command Modes

Any command mode

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

You can use this command to display information about a specified VLAN, including the private VLANs.

The information is gathered at 1-minute intervals.

When you specify a primary VLAN, the device displays all secondary VLANs mapped to the specified primary VLAN.

The device displays the output for the private-vlan mapping keyword only when you specify a primary private VLAN. If you specify a secondary private VLAN and enter the private-vlan mapping keyword, the output is blank.

You can configure a VLAN network interface with a static MAC address, and this command will display that configured MAC address. See the mac-address command for information on configuring a VLAN network interface with a static MAC address.

This command does not require a license.

Examples

This example shows how to display information about the specified VLAN. This command displays statistical information gathered on the VLAN at 1-minute intervals:

switch# show interface vlan 5

Vlan5 is administratively down, line protocol is down

  Hardware is EtherSVI, address is  0000.0000.0000

  MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,

   reliability 255/255, txload 1/255, rxload 1/255

  Encapsulation ARPA, loopback not set

  Last clearing of "show interface" counters 01:21:55

  1 minute input rate 0 bytes/sec, 0 packets/sec

  1 minute output rate 0 bytes/sec, 0 packets/sec

    input: 0 pkts, 0 bytes - output: 0 pkts, 0 bytes

    ucast: 0 pkts, 0 bytes - mcast: 0 pkts, 0 bytes

    ucast: 0 pkts, 0 bytes - mcast: 0 pkts, 0 bytes

This example shows how to display a brief description for a specified VLAN. This displays shows the secondary VLAN and type, if configured, and the status:

switch# show interface vlan 5 brief

-------------------------------------------------------------------------------

Interface      Secondary VLAN(Type)                    Status     Reason

-------------------------------------------------------------------------------

This example shows how to display the description for a specified VLAN:

switch# show interface vlan 100 description

------------------------------------------

------------------------------------------

This example shows how to display information about the private VLAN mapping, if any, for a specified VLAN:

switch# show interface vlan 200 private-vlan mapping

--------- ----------------------------------------------------------------

This example shows how to display the status for a specified VLAN:

switch# show interface vlan 5 status

------------------------------------------

Interface          Status         Protocol

------------------------------------------

Related Commands

show interface vlan counters

To display the statistics for a specified VLAN, use the show interface vlan counters command.

show interface vlan {vlan-id} counters [detailed [all] | snmp]

Syntax Description

Defaults

None

Command Modes

Any command mode

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

You can use this command to display information about the received octets, unicast packets, multicast packets, and broadcast packets as well as the transmitted octets, unicast packets, multicast packets, and broadcast packets for all VLANs, including private VLANs.

This command does not require a license.

Examples

This example shows how to display the statistics for a specified VLAN:

switch# show interface vlan 9 counters

--------------------------------------------------------------------------------

Port              InOctets   InUcastPkts   InMcastPkts   InBcastPkts

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

Port             OutOctets  OutUcastPkts  OutMcastPkts  OutBcastPkts

--------------------------------------------------------------------------------

This example shows how to display only the nonzero counters for a specified VLAN:

switch# show interface vlan 2 counters detailed

  l3_average_input_bits                        9947168160

  l3_average_input_packets                       20723267

  l3_routed_bytes_in                          39054410460

  l3_routed_pkts_in                             650906841

  l3_ucast_bytes_in                           39054410460

  l3_ucast_pkts_in                              650906841

This example shows how to display all detailed statistics for a specified VLAN:

switch(config)# show interface vlan 9 counters detailed all

   0.             l3_ipv4_ucast_bytes_in = 0

   1.              l3_ipv4_ucast_pkts_in = 0

   2.             l3_ipv4_mcast_bytes_in = 0

   3.              l3_ipv4_mcast_pkts_in = 0

   4.             l3_ipv6_ucast_bytes_in = 0

   5.              l3_ipv6_ucast_pkts_in = 0

   6.             l3_ipv6_mcast_bytes_in = 0

   7.              l3_ipv6_mcast_pkts_in = 0

   8.            l3_ipv4_ucast_bytes_out = 0

   9.             l3_ipv4_ucast_pkts_out = 0

  10.            l3_ipv4_mcast_bytes_out = 0

  11.             l3_ipv4_mcast_pkts_out = 0

  12.            l3_ipv6_ucast_bytes_out = 0

  13.             l3_ipv6_ucast_pkts_out = 0

  14.            l3_ipv6_mcast_bytes_out = 0

  15.             l3_ipv6_mcast_pkts_out = 0

  16.             l3_average_input_bytes = 0

  17.           l3_average_input_packets = 0

  18.            l3_average_output_bytes = 0

  19.          l3_average_output_packets = 0

  20.                 l3_routed_bytes_in = 0

  21.                  l3_routed_pkts_in = 0

  22.                  l3_ucast_bytes_in = 0

  24.                  l3_mcast_bytes_in = 0

  26.                l3_routed_bytes_out = 0

  27.                 l3_routed_pkts_out = 0

  28.                 l3_ucast_bytes_out = 0

  29.                  l3_ucast_pkts_out = 0

  30.                 l3_mcast_bytes_out = 0

  31.                  l3_mcast_pkts_out = 0

This example shows how to display the MIB values for a specified VLAN:

switch(config)# show interface vlan 9 counters snmp

-------------------------------------------------------------------------------

Port              InOctets   InUcastPkts   InMcastPkts   InBcastPkts

-------------------------------------------------------------------------------

-------------------------------------------------------------------------------

Port             OutOctets  OutUcastPkts  OutMcastPkts  OutBcastPkts

-------------------------------------------------------------------------------

Ethernet2/28               0000.0000.0000  0019.076c.4dc7

Ethernet2/29               0000.0000.0000  0019.076c.4dc8

Ethernet2/30               0000.0000.0000  0019.076c.4dc9

Related Commands

show mac address-table

To display the information about the MAC address table, use the show mac address-table command.

show mac address-table [num] [dynamic | static] [address mac-address | count | interface {type slot/port | port-channel number} | vlan vlan-id]

Syntax Description

Defaults

None

Command Modes

Any command mode

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

A primary entry is a MAC address learned on that interface.

Note Use the show mac address-table command without the num argument to display only the primary entries on all modules. When you use the num argument, the device displays all the entries on that module as specified by additional optional arguments.

The device maintains static MAC address entries saved in the startup-config file across reboots and flushes the dynamic entries.

The MAC address table for each virtual device context (VDC) is separate and distinct.

Note To display the MAC address for the VDC, use the show vdc command.

This command does not require a license.

Examples

Note In the following examples, NTFY means notify.

This example shows how to display the information about the entries for the Layer 2 MAC address table:

switch# show mac address-table

        * - primary entry, G - Gateway MAC, (R) - Routed MAC

        age - seconds since last seen

   VLAN     MAC Address      Type      age     Secure  NTFY   Ports

---------+-----------------+--------+---------+------+------+----------------

G     -    0018.bad8.3fbd    static       -     False  False sup-eth1(R)

* 3        1234.dd56.ee89    static       -     False  False Eth2/1

This example shows how to display the information about the entries for the Layer 2 MAC address table for a specific module:

switch# show mac address-table 2

        * - primary entry, G - Gateway MAC, (R) - Routed MAC

        age - seconds since last seen

   VLAN     MAC Address      Type      age     Secure  NTFY   Ports

---------+-----------------+--------+---------+------+------+----------------

G     -    0018.bad8.3fbd    static       -     False  False sup-eth1(R)

* 3        1234.dd56.ee89    static       -     False  False Eth2/1

3          0000.23bd.4fda    dynamic     70     False  False Eth1/1

This example shows how to display the information about the entries for the Layer 2 MAC address table for a specific MAC address:

switch# show mac address-table address 0018.bad8.3fbd

        * - primary entry, G - Gateway MAC, (R) - Routed MAC

        age - seconds since last seen

   VLAN     MAC Address      Type      age     Secure  NTFY   Ports

---------+-----------------+--------+---------+------+------+----------------

G     -    0018.bad8.3fbd    static       -     False  False sup-eth1(R)

This example shows how to display the information about the dynamic entries for the Layer 2 MAC address table:

switch# show mac address-table dynamic

        * - primary entry, G - Gateway MAC, (R) - Routed MAC

        age - seconds since last seen

   VLAN     MAC Address      Type      age     Secure  NTFY   Ports

---------+-----------------+--------+---------+------+------+---------------- 

* 3        0010.fcbc.3fbd    dynamic    1265    False  False Eth2/12

* 3        1234.dd56.ee89    dynamic    850     False  False Eth2/1

This example shows how to display the information about the Layer 2 MAC address table for a specific interface:

switch# show mac address-table interface ethernet 2/13

        * - primary entry, G - Gateway MAC, (R) - Routed MAC

        age - seconds since last seen

   VLAN     MAC Address      Type      age     Secure  NTFY   Ports

---------+-----------------+--------+---------+------+------+----------------

* 1       1234.dd56.ee89    dynamic    0       False  False Eth2/13

This example shows how to display the static entries in the Layer 2 MAC address table:

switch# show mac address-table static

        * - primary entry, G - Gateway MAC, (R) - Routed MAC

        age - seconds since last seen

   VLAN     MAC Address      Type      age     Secure  NTFY   Ports

---------+-----------------+--------+---------+------+------+----------------

G     -    0018.bad8.3fbd    static       -     False  False sup-eth1(R)

* 3        1234.dd56.ee89    static       -     False  False Eth2/1

This example shows how to display the entries in the Layer 2 MAC address table for a specific VLAN:

switch# show mac address-table vlan 3

        * - primary entry, G - Gateway MAC, (R) - Routed MAC

        age - seconds since last seen

   VLAN     MAC Address      Type      age     Secure  NTFY   Ports

---------+-----------------+--------+---------+------+------+----------------

* 3        1234.dd56.ee89    static       -     False  False Eth2/1

Related Commands

show mac address-table aging-time

To display information about the timeout values for the MAC address table, use the show mac-address-table aging-time command.

show mac address-table aging-time [vlan vlan-id]

Syntax Description

Defaults

None

Command Modes

Any command mode

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

You can configure the MAC address aging time per VLAN or for the entire device. The valid range is from 120 to 918000. Entering 0 disables the MAC aging time.

This command does not require a license.

Examples

This example shows how to display MAC address aging times:

switch# show mac address-table aging-time

Related Commands

show running-config spanning-tree

To display the running configuration for the Spanning Tree Protocol (STP), use the show running-config spanning-tree command.

show running-config spanning-tree [all]

Syntax Description

Defaults

None

Command Modes

Any command mode

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

This command provides information about the Spanning Tree Protocol.

Note The display output differs slightly depending on whether you are running Rapid Per VLAN Spanning Tree (Rapid PVST+) or Multiple Spanning Tree (MST).

This command does not require a license.

Examples

This example shows how to display information about the running STP configuration when you are running MST:

switch# show running-config spanning-tree

This example shows how to display detailed information about the running STP configuration when you are running MST:

switch# show running-config spanning-tree all

no spanning-tree port type edge default

no spanning-tree port type network default

spanning-tree bridge assurance

no spanning-tree loopguard default

spanning-tree mst simulate pvst global

no snmp-server enable traps bridge topologychange

no snmp-server enable traps bridge newroot

no snmp-server enable traps stpx inconsistency

no snmp-server enable traps stpx loop-inconsistency

no snmp-server enable traps stpx root-inconsistency

spanning-tree mst hello-time 2

spanning-tree mst forward-time 15

spanning-tree mst max-age 20

spanning-tree mst max-hops 20

spanning-tree mst 0 priority 32768

spanning-tree mst configuration

configure interface Ethernet8/1

  spanning-tree port-priority 128

Related Commands

show running-config vlan

To display the running configuration for a specified VLAN, use the show running-config vlan command.

show running-config vlan {vlan-id}

Syntax Description

Defaults

None

Command Modes

Any command mode

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

This command provides information about the specified VLAN, including private VLANs.

The display varies with your configuration. If you configure the name, shutdown status, or suspended status, these are also displayed.

This command does not require a license.

Examples

This example shows how to display the running configuration for VLAN 50:

switch(config)# show running-config vlan 50

Related Commands

show running-config vtp

To display the running configuration for the VLAN Trunking Protocol (VTP), use the show running-config vtp command.

show running-config vtp

Syntax Description

This command has no arguments or keywords

Defaults

None

Command Modes

Any command mode

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

This command provides information about VTP.

This command does not require a license.

Examples

This example shows how to display the running configuration for VTP:

switch(config)# show running-config vtp

Related Commands

show spanning-tree

To display information about the Spanning Tree Protocol (STP), use the show spanning-tree command.

show spanning-tree [blockedports | inconsistentports | pathcost method]

Syntax Description

Defaults

None

Command Modes

Any command mode

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

The STP port type displays only when you have configured the port as either an STP edge port or an STP network port. If you have not configured the STP port type, no port type displays.

Note The display output differs slightly depending on whether you are running Rapid PVST+ or MST.

This command does not require a license.

Examples

This example shows how to display STP when you are running Rapid PVST+:

switch# show spanning-tree

  Spanning tree enabled protocol rstp

             Port        4105 (port-channel10)

             Hello Time  2  sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority    32769  (priority 32768 sys-id-ext 1)

             Hello Time  2  sec  Max Age 20 sec  Forward Delay 15 sec

Interface        Role Sts Cost      Prio.Nbr Type

---------------- ---- --- --------- -------- --------------------------------

Po10             Root FWD 2         128.4105 (vPC peer-link) P2p 

Po20             Desg FWD 1         128.4115 (vPC) P2p 

Po30             Root FWD 1         128.4125 (vPC) P2p 

  Spanning tree enabled protocol rstp

             Port        4105 (port-channel10)

             Hello Time  2  sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority    32770  (priority 32768 sys-id-ext 2)

             Hello Time  2  sec  Max Age 20 sec  Forward Delay 15 sec

Interface        Role Sts Cost      Prio.Nbr Type

---------------- ---- --- --------- -------- --------------------------------

Po10             Root FWD 2         128.4105 (vPC peer-link) P2p 

Po20             Desg FWD 1         128.4115 (vPC) P2p 

Po30             Root FWD 1         128.4125 (vPC) P2p 

  Spanning tree enabled protocol rstp

             Port        4105 (port-channel10)

             Hello Time  2  sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority    32771  (priority 32768 sys-id-ext 3)

             Hello Time  2  sec  Max Age 20 sec  Forward Delay 15 sec

Interface        Role Sts Cost      Prio.Nbr Type

---------------- ---- --- --------- -------- --------------------------------

Po10             Root FWD 2         128.4105 (vPC peer-link) P2p 

Po20             Desg FWD 1         128.4115 (vPC) P2p 

Po30             Root FWD 1         128.4125 (vPC) P2p 

  Spanning tree enabled protocol rstp

             Port        4105 (port-channel10)

             Hello Time  2  sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority    32772  (priority 32768 sys-id-ext 4)

             Hello Time  2  sec  Max Age 20 sec  Forward Delay 15 sec

Interface        Role Sts Cost      Prio.Nbr Type

---------------- ---- --- --------- -------- --------------------------------

Po10             Root FWD 2         128.4105 (vPC peer-link) P2p 

Po20             Desg FWD 1         128.4115 (vPC) P2p 

Po30             Root FWD 1         128.4125 (vPC) P2p 

This example shows how to display STP information when you are running MST:

switch# show spanning-tree

  Spanning tree enabled protocol mstp

             Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority    32768 (priority 32768 sys-id-ext 0)

             Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec

Interface         Role Sts Cost       Prio.Nbr   Type

---------------- ----- --- ---------  --------   ------------------------------------

Eth2/1            Altn  BKN 20000     128.257    Network, P2p   BA_Inc.

Eth2/2            Root  FWD 20000     128.258    Edge, P2p

Eth3/48           Desg  FWD 20000     128.43228  P2p

This example shows how to display the blocked ports in spanning tree:

switch(config)# show spanning-tree blockedports

Name                 Blocked Interfaces List

-------------------- ------------------------------------

This example shows how to determine if any ports are in any STP-inconsistent state:

switch#  show spanning-tree inconsistentports 

Name                 Interface              Inconsistency

-------------------- ---------------------- ------------------

MST0000              Eth8/1                 Bridge Assurance Inconsistent

MST0000              Eth8/2                 Bridge Assurance Inconsistent

This example shows how to display the path-cost method when you are running Rapid PVST+:

switch(config)# show spanning-tree pathcost method

Spanning tree default pathcost method used is short

This example shows how to display the path-cost method when you are running MST:

switch(config)# show spanning-tree pathcost method

Spanning tree default pathcost method used is short (Operational value is long)

Table 1-1 describes the fields that are shown in the examples.

Related Commands

show spanning-tree active

To display Spanning Tree Protocol (STP) information on STP-active interfaces only, use the show spanning-tree active command.

show spanning-tree active [brief | detail]

Syntax Description

Defaults

None

Command Modes

Any command mode

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

This command does not require a license.

Examples

This example shows how to display STP information on the STP active interfaces:

switch# show spanning-tree active

  Spanning tree enabled protocol rstp

             Port        4105 (port-channel10)

             Hello Time  2  sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority    32769  (priority 32768 sys-id-ext 1)

             Hello Time  2  sec  Max Age 20 sec  Forward Delay 15 sec

Interface        Role Sts Cost      Prio.Nbr Type

---------------- ---- --- --------- -------- --------------------------------

Po10             Root FWD 2         128.4105 (vPC peer-link) P2p 

Po20             Desg FWD 1         128.4115 (vPC) P2p 

Po30             Root FWD 1         128.4125 (vPC) P2p 

  Spanning tree enabled protocol rstp

             Port        4105 (port-channel10)

             Hello Time  2  sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority    32770  (priority 32768 sys-id-ext 2)

             Hello Time  2  sec  Max Age 20 sec  Forward Delay 15 sec

Interface        Role Sts Cost      Prio.Nbr Type

---------------- ---- --- --------- -------- --------------------------------

Po10             Root FWD 2         128.4105 (vPC peer-link) P2p 

Po20             Desg FWD 1         128.4115 (vPC) P2p 

Po30             Root FWD 1         128.4125 (vPC) P2p 

  Spanning tree enabled protocol rstp

             Port        4105 (port-channel10)

             Hello Time  2  sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority    32771  (priority 32768 sys-id-ext 3)

             Hello Time  2  sec  Max Age 20 sec  Forward Delay 15 sec

Interface        Role Sts Cost      Prio.Nbr Type

---------------- ---- --- --------- -------- --------------------------------

Po10             Root FWD 2         128.4105 (vPC peer-link) P2p 

Po20             Desg FWD 1         128.4115 (vPC) P2p 

Po30             Root FWD 1         128.4125 (vPC) P2p 

  Spanning tree enabled protocol rstp

             Port        4105 (port-channel10)

             Hello Time  2  sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority    32772  (priority 32768 sys-id-ext 4)

             Hello Time  2  sec  Max Age 20 sec  Forward Delay 15 sec

Interface        Role Sts Cost      Prio.Nbr Type

---------------- ---- --- --------- -------- --------------------------------

Po10             Root FWD 2         128.4105 (vPC peer-link) P2p 

Po20             Desg FWD 1         128.4115 (vPC) P2p 

Po30             Root FWD 1         128.4125 (vPC) P2p 

Related Commands

show spanning-tree bridge

To display the status and configuration of the Spanning-Tree Protocol (STP) local bridge, use the show spanning-tree bridge command.

show spanning-tree bridge [address | brief | detail | forward-time | hello-time | id | max-age | priority [system-id] | protocol]

Syntax Description

Defaults

None

Command Modes

Any command mode

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

This command does not require a license.

Examples

This example shows how to display STP information for the bridge:

switch(config)# show spanning-tree bridge

MST Instance                 Bridge ID              Time  Age  Dly  Protocol

---------------- --------------------------------- -----  ---  ---  --------

MST0000             32768 (32768,0) 0018.bad7.fc15    2    20   15  mstp

Related Commands

show spanning-tree brief

To display a brief summary of the Spanning Tree Protocol (STP) status and configuration on the device, use the show spanning-tree brief command.

show spanning-tree brief [active]

Syntax Description

Defaults

None

Command Modes

Any command mode

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

This command does not require a license.

Examples

This example shows how to display a brief summary of STP information:

switch(config)# show spanning-tree brief

  Spanning tree enabled protocol rstp

             Port        4105 (port-channel10)

             Hello Time  2  sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority    32769  (priority 32768 sys-id-ext 1)

             Hello Time  2  sec  Max Age 20 sec  Forward Delay 15 sec

Interface        Role Sts Cost      Prio.Nbr Type

---------------- ---- --- --------- -------- --------------------------------

Po10             Root FWD 2         128.4105 (vPC peer-link) P2p 

Po20             Desg FWD 1         128.4115 (vPC) P2p 

Po30             Root FWD 1         128.4125 (vPC) P2p 

  Spanning tree enabled protocol rstp

             Port        4105 (port-channel10)

             Hello Time  2  sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority    32770  (priority 32768 sys-id-ext 2)

             Hello Time  2  sec  Max Age 20 sec  Forward Delay 15 sec

Interface        Role Sts Cost      Prio.Nbr Type

---------------- ---- --- --------- -------- --------------------------------

Po10             Root FWD 2         128.4105 (vPC peer-link) P2p 

Po20             Desg FWD 1         128.4115 (vPC) P2p 

Po30             Root FWD 1         128.4125 (vPC) P2p 

Related Commands

show spanning-tree detail

To display detailed information on the Spanning Tree Protocol (STP) status and configuration on the device, use the show spanning-tree detail command.

show spanning-tree detail [active]

Syntax Description

Defaults

None

Command Modes

Any command mode

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

This command does not require a license.

Examples

This example shows how to display detailed information about the STP configuration:

switch(config)# show spanning-tree detail

VLAN0001 is executing the rstp compatible Spanning Tree protocol

  Bridge Identifier has priority 32768, sysid 1, address 0022.5579.7641

  Configured hello time 2, max age 20, forward delay 15

  Current root has priority 32769, address 000d.eca3.9f01

  Root port is 4105 (port-channel10), cost of root path is 4

  Topology change flag not set, detected flag not set

  Number of topology changes 1 last change occurred 20:24:36 ago

  Times:  hold 1, topology change 35, notification 2

          hello 2, max age 20, forward delay 15 

  Timers: hello 0, topology change 0, notification 0

 Port 4105 (port-channel10, vPC Peer-link) of VLAN0001 is root forwarding 

   Port path cost 2, Port priority 128, Port Identifier 128.4105

   Designated root has priority 32769, address 000d.eca3.9f01

   Designated bridge has priority 32769, address 0022.5579.7341

   Designated port id is 128.4105, designated path cost 2

   Timers: message age 16, forward delay 0, hold 0

   Number of transitions to forwarding state: 1

   Link type is point-to-point by default

   BPDU: sent 36729, received 36739

 Port 4115 (port-channel20, vPC) of VLAN0001 is designated forwarding 

   Port path cost 1, Port priority 128, Port Identifier 128.4115

   Designated root has priority 32769, address 000d.eca3.9f01

   Designated bridge has priority 32769, address 0022.5579.7341

   Designated port id is 128.4115, designated path cost 2

   Timers: message age 0, forward delay 0, hold 0

   Number of transitions to forwarding state: 0

   Link type is point-to-point by default

 Port 4125 (port-channel30, vPC) of VLAN0001 is root forwarding 

   Port path cost 1, Port priority 128, Port Identifier 128.4125

   Designated root has priority 32769, address 000d.eca3.9f01

   Designated bridge has priority 32769, address 000d.eca3.9f01

   Designated port id is 128.4125, designated path cost 0

   Timers: message age 0, forward delay 0, hold 0

   Number of transitions to forwarding state: 0

   Link type is point-to-point by default

Related Commands

show spanning-tree interface

To display information about the Spanning Tree Protocol (STP) interface status and configuration of specified interfaces, use the show spanning-tree interface command.

show spanning-tree interface {ethernet {slot/port} | port-channel {channel-number}} [active [brief | detail] | brief [active] | cost | detail [active] | edge | inconsistency | priority | rootcost | state]

Syntax Description

Defaults

None

Command Modes

Any command mode

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

The STP port type displays only when you have configured the port as either an STP edge port or an STP network port. If you have not configured the STP port type, no port type displays.

If you specify an interface that is not running STP, the device returns an error message.

When you are running MST, this command displays the PVST simulation setting.

Note If you are running MST, use the show spanning-tree mst command to show more detail on the specified interfaces.

This command does not require a license.

Examples

This example shows how to display STP information about a specified interface when you are running Rapid PVST+:

switch(config)# show spanning-tree interface ethernet 8/2

Vlan             Role Sts Cost      Prio.Nbr Type

---------------- ---- --- --------- -------- --------------------------------

VLAN0001         Altn BLK 20000     128.1025 P2p

VLAN0002         Desg FWD 20000     128.1025 P2p

This example shows how to display STP information about a specified interface when you are running MST:

switch(config)# show spanning-tree interface ethernet 2/50

Mst Instance     Role Sts Cost      Prio.Nbr Type

---------------- ---- --- --------- -------- --------------------------------

MST0000          Desg FWD 20000     128.1281 P2p

This example shows how to display detailed STP information about a specified interface when you are running Rapid PVST+:

switch(config)# show spanning-tree interface ethernet 8/1 detail

Port 1025 (Ethernet8/1) of VLAN0001 is alternate blocking

   Port path cost 20000, Port priority 128, Port Identifier 128.1025

   Designated root has priority 28672, address 0018.bad8.239d

   Designated bridge has priority 28672, address 0018.bad8.239d

   Designated port id is 128.1281, designated path cost 0

   Timers: message age 15, forward delay 0, hold 0

   Number of transitions to forwarding state: 1

   Link type is point-to-point by default

   The port type is network by default.

   BPDU: sent 4657, received 188

 Port 1025 (Ethernet8/1) of VLAN0002 is designated forwarding

   Port path cost 20000, Port priority 128, Port Identifier 128.1025

   Designated root has priority 32770, address 0018.bad7.fc15

   Designated bridge has priority 32770, address 0018.bad7.fc15

   Designated port id is 128.1025, designated path cost 0

   Timers: message age 0, forward delay 0, hold 0

   Number of transitions to forwarding state: 1

   Link type is point-to-point by default 
   The port type is network by default.

   BPDU: sent 4838, received 0

This example shows how to display detailed STP information about a specified interface when you are running MST:

switch(config)# show spanning-tree interface ethernet 10/1 detail

Port 1281 (Ethernet10/1) of MST0000 is designated forwarding

   Port path cost 20000, Port priority 128, Port Identifier 128.1281

   Designated root has priority 28672, address 0018.bad8.239d

   Designated bridge has priority 28672, address 0018.bad8.239d

   Designated port id is 128.1281, designated path cost 0

   Timers: message age 0, forward delay 0, hold 0

   Number of transitions to forwarding state: 1

   Link type is point-to-point by default, Internal

   PVST Simulation is enabled by default

   BPDU: sent 290, received 0

This example shows how to display detailed STP information about a specified port-channel interface when you are running a virtual port channel (vPC):

switch(config)# show spanning-tree interface port-channel 10

Vlan             Role Sts Cost      Prio.Nbr Type

---------------- ---- --- --------- -------- --------------------------------

VLAN0001         Root FWD 2         128.4105 (vPC peer-link) P2p 

VLAN0002         Root FWD 2         128.4105 (vPC peer-link) P2p 

VLAN0003         Root FWD 2         128.4105 (vPC peer-link) P2p 

VLAN0004         Root FWD 2         128.4105 (vPC peer-link) P2p 

Related Commands

show spanning-tree mst

To display information about the Multiple Spanning Tree (MST ) status and configuration, use the show spanning-tree mst command.

show spanning-tree mst [instance-id [detail | interface {ethernet {slot/port} | port-channel {channel-number}} [detail]]] | [configuration [digest]] | [detail] | [interface {ethernet {slot/port} | port-channel {channel-number}} [detail]]

Defaults

None

Command Modes

Any command mode

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

If you are not running in Spanning Tree Protocol (STP) Multiple Spanning Tree (MST) mode but are running in STP Rapid Per VLAN Spanning Tree (Rapid PVST+) mode, when you enter this command, the device returns the following message:

ERROR: Switch is not in mst mode

See Table 1-1 for information on valid values for fields.

This command does not require a license.

Examples

This example shows how to display STP information about MST instance information for the VLAN ports that are currently active:

switch# show spanning-tree mst

##### MST0    vlans mapped:   1-4094

Bridge        address 0018.bad7.fc15  priority      32768 (32768 sysid 0)

Root          this switch for the CIST

Regional Root this switch

Operational   hello time 2 , forward delay 15, max age 20, txholdcount 6

Configured    hello time 2 , forward delay 15, max age 20, max hops    20

Interface        Role Sts Cost      Prio.Nbr Type

---------------- ---- --- --------- -------- --------------------------------

Eth8/1           Desg FWD 20000     128.1025 P2p

Eth8/2           Desg FWD 20000     128.1026 P2p

This example shows how to display STP information about a specific MST instance:

switch)# show spanning-tree mst 0

##### MST0    vlans mapped:   1-4094

Bridge        address 0018.bad7.fc15  priority      32768 (32768 sysid 0)

Root          this switch for the CIST

Regional Root this switch

Operational   hello time 2 , forward delay 15, max age 20, txholdcount 6

Configured    hello time 2 , forward delay 15, max age 20, max hops    20

Interface        Role Sts Cost      Prio.Nbr Type

---------------- ---- --- --------- -------- --------------------------------

Eth8/1           Desg FWD 20000     128.1025 P2p

Eth8/2           Desg FWD 20000     128.1026 P2p

This example shows how to display detailed STP information about the MST protocol:

switch)# show spanning-tree mst detail

##### MST0    vlans mapped:   1-4094

Bridge        address 0018.bad7.fc15  priority      32768 (32768 sysid 0)

Root          this switch for the CIST

Regional Root this switch

Operational   hello time 2 , forward delay 15, max age 20, txholdcount 6

Configured    hello time 2 , forward delay 15, max age 20, max hops    20

Eth8/1 of MST0 is designated forwarding

Port info             port id       128.1025  priority    128  cost   20000

Designated root       address 0018.bad7.fc15  priority  32768  cost   0

Design. regional root address 0018.bad7.fc15  priority  32768  cost   0

Designated bridge     address 0018.bad7.fc15  priority  32768  port id 128.1025

Timers: message expires in 0 sec, forward delay 0, forward transitions 1

Bpdus sent 1379, received 3

Eth8/2 of MST0 is designated forwarding

Port info             port id       128.1026  priority    128  cost   20000

Designated root       address 0018.bad7.fc15  priority  32768  cost   0

Design. regional root address 0018.bad7.fc15  priority  32768  cost   0

Designated bridge     address 0018.bad7.fc15  priority  32768  port id 128.1026

Timers: message expires in 0 sec, forward delay 0, forward transitions 1

Bpdus sent 1380, received 2

This example shows how to display STP information about specified MST interfaces:

switch)# show spanning-tree mst interface ethernet 8/2

Eth8/2 of MST0 is designated forwarding

Port Type: normal         (default)           port guard : none        (default)

Link type: point-to-point (auto)              bpdu filter: disable     (default)

Boundary : internal                           bpdu guard : disable     (default)

Bpdus sent 1423, received 2

Instance Role Sts Cost      Prio.Nbr Vlans mapped

-------- ---- --- --------- -------- -------------------------------

0        Desg FWD 20000     128.1026 1-4094

This example shows how to display information about the MST configuration:

switch)# show spanning-tree mst configuration

Revision:   1       Instances Configured: 3

---------   --------------------------------------------------

----------------------------------------------------------------  

This example shows how to display the MD5 digest included in the current MST configuration:

switch)# show spanning-tree mst configuration digest

Revision  10    Instances configured 25

Digest          0x40D5ECA178C657835C83BBCB16723192

Pre-std Digest  0x27BF112A75B72781ED928D9EC5BB4251

Related Commands

show spanning-tree root

To display the status and configuration of the Spanning Tree Protocol (STP) root bridge, use the show spanning-tree root command.

show spanning-tree root [address | brief | cost | detail | forward-time | hello-time | id | max-age | port | priority [system-id]]

Syntax Description

Defaults

None

Command Modes

Any command mode

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

This command does not require a license.

Examples

This example shows how to display information for the root bridge:

switch(config)# show spanning-tree root

MST Instance           Root ID          Cost  Time Age Dly  Root Port

---------------- -------------------- ------ ----- --- ---  ----------------

MST0000          32768 0018.bad7.fc15       0    2   20  15  This bridge is root

Related Commands

show spanning-tree summary

To display summary Spanning Tree Protocol (STP) information on the device, use the show spanning-tree summary command.

show spanning-tree summary [totals]

Syntax Description

Defaults

None

Command Modes

Any command mode

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

The display output for this command differs when you are running Rapid Per VLAN Spanning Tree (Rapid PVST+) or Multiple Spanning Tree (MST).

This command does not require a license.

Examples

This example shows how to display a summary of STP information about the device when you are running Rapid PVST+:

switch(config)# show spanning-tree summary

Switch is in rapid-pvst mode 

Root bridge for: VLAN0001

Port Type Default                        is disable

Edge Port [PortFast] BPDU Guard Default  is disabled

Edge Port [PortFast] BPDU Filter Default is disabled

Bridge Assurance                         is enabled

Loopguard Default                        is disabled

Pathcost method used                     is short

Name                   Blocking Listening Learning Forwarding STP Active

---------------------- -------- --------- -------- ---------- ----------

---------------------- -------- --------- -------- ---------- ----------

STP-lite running in the following VLAN instances

------------------------------------------------

This example shows how to display a summary of STP information about the device when you are running MST:

switch(config)# show spanning-tree summary

Switch is in mst mode (IEEE Standard)

Port Type Default                        is disable

Edge Port [PortFast] BPDU Guard Default  is disabled

Edge Port [PortFast] BPDU Filter Default is disabled

Bridge Assurance                         is enabled

Loopguard Default                        is disabled

Pathcost method used                     is long

PVST Simulation                          is enabled

Name                   Blocking Listening Learning Forwarding STP Active

---------------------- -------- --------- -------- ---------- ----------

---------------------- -------- --------- -------- ---------- ----------

Related Commands

show spanning-tree vlan

To display Spanning Tree Protocol (STP) information for specified VLANs, use the show spanning-tree vlan command.

show spanning-tree vlan {vlan-id}
[active [brief | detail]
| blockedports
| bridge [address] | brief | detail | forward-time | hello-time | id | max-age | priority [system-id] | protocol
| brief [active]
| detail
| inconsistentports
| interface {ethernet {slot/port} | port-channel {channel-number}} [active [brief | detail]] | brief [active] | cost | detail [active] | edge | inconsistency | priority | rootcost | state]]
| root [address | brief | cost | detail | forward-time | hello-time | id | max-age | port | priority [system-id]]
| summary}

Syntax Description

Defaults

None

Command Modes

Any command mode

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

This command does not require a license.

Examples

This example shows how to display STP information about VLAN 4:

switch# show spanning-tree vlan 4

  Spanning tree enabled protocol rstp

             Port        4105 (port-channel10)

             Hello Time  2  sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority    32772  (priority 32768 sys-id-ext 4)

             Hello Time  2  sec  Max Age 20 sec  Forward Delay 15 sec

Interface        Role Sts Cost      Prio.Nbr Type

---------------- ---- --- --------- -------- --------------------------------

Po10             Root FWD 2         128.4105 (vPC peer-link) P2p 

Po20             Desg FWD 1         128.4115 (vPC) P2p 

Po30             Root FWD 1         128.4125 (vPC) P2p 

Related Commands

show startup-config vlan

To display VLAN configuration information in the startup configuration, use the show startup-config vlan command.

show startup-config vlan {vlan-id}

Syntax Description

Defaults

None

Command Modes

Any command mode

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

This command does not require a license.

Examples

This example shows how to display the VLAN information in the startup configuration:

switch(config)# show startup-config vlan

Related Commands

show startup-config vtp

To display VLAN Trunking Protocol (VTP) configuration information in the startup configuration, use the show startup-config vtp command.

show startup-config vtp

Syntax Description

This command has no arguments or keywords.

Defaults

None

Command Modes

Any command mode

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

This command does not require a license.

Examples

This example shows how to display the VTP information in the startup configuration:

switch(config)# show startup-config vtp

Related Commands

show system vlan reserved

To display the system reserved VLAN range, use the show system vlan reserved command.

show system vlan reserved

Syntax Description

This command has no arguments or keywords.

Defaults

None

Command Modes

Any command mode

Supported User Roles

network-admin
network-poerator
vdc-admin
vdc-operator

Command History

Usage Guidelines

This command does not require a license.

Examples

This example shows how to display the system reserved VLAN range:

switch# show system vlan reserved 

system current running vlan reservation: 3968-4095

Related Commands

show vlan

To display VLAN information, use the show vlan command.

show vlan [all-ports | brief | {name name} | summary]

Syntax Description

Defaults

None

Command Modes

Any command mode

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

This command displays information for all VLANs, including private VLANs, on the device.

Each access port can belong to only one VLAN. Trunk ports can be on multiple VLANs.

Note Although a port can be associated with a VLAN as an access VLAN, a native VLAN, or one of the trunk allowed ports, the display under Ports for this commands lists only access VLANs.

If you shut down a VLAN using the state suspend or the state active command, these values appear in the Status field:

•suspended—The VLAN is suspended.

•active—The VLAN is active.

If you shut down a VLAN using the shutdown command, these values appear in the Status field:

•act/lshut—The VLAN status is active but shut down locally.

•sus/lshut—The VLAN status is suspended but shut down locally.

If a VLAN is shut down internally, these values appear in the Status field:

•act/ishut—The VLAN status is active but shut down internally.

•sus/ishut—The VLAN status is suspended but shut down internally.

If a VLAN is shut down locally and internally, the value that is displayed in the Status field is act/ishut or sus/ishut. If a VLAN is shut down locally only, the value that is displayed in the Status field is act/lshut or sus/lshut.

Examples

This example shows how to display information for all VLANs on the device:

---- -------------------------------- --------- -------------------------------

1    default                          active    Eth5/1, Eth5/2, Eth5/3, Eth5/4

                                                Eth5/5, Eth5/6, Eth5/7, Eth5/8

                                                Eth5/12, Eth5/13, Eth5/14

                                                Eth5/15, Eth5/16, Eth5/17

                                                Eth5/18, Eth5/19, Eth5/20

                                                Eth5/21, Eth5/22, Eth5/23

                                                Eth5/24, Eth5/25, Eth5/26

                                                Eth5/27, Eth5/28, Eth5/29

                                                Eth5/30, Eth5/31, Eth5/32

-------------------------------------------------------------------------------

Primary  Secondary  Type             Ports

-------  ---------  ---------------  -------------------------------------------

This example shows how to display the VLANs and all ports for each VLAN:

switch# show vlan all-ports

---- -------------------------------- --------- -------------------------------

1    default                          active    Po5, Po37, Po50, Eth2/1, Eth2/2

                                                Eth2/3, Eth2/5, Eth2/7, Eth2/8

                                                Eth2/21, Eth2/22, Eth2/23

                                                Eth2/24, Eth2/25, Eth2/26

                                                Eth2/27, Eth2/28, Eth2/46

50   VLAN0050                         active    Eth2/6

This example shows how to display the VLAN name, status, and associated ports only:

---- -------------------------------- --------- -------------------------------

1    default                          active    Eth2/5, Eth2/7, Eth2/8, Eth2/9

                                                Eth2/10, Eth2/15, Eth2/47

50   VLAN0050                         active    Eth2/6

This example shows how to display the VLAN information for a specific VLAN by name:

switch# show vlan name test

---- -------------------------------- --------- -------------------------------

Primary  Secondary  Type             Ports

-------  ---------  ---------------  -------------------------------------------100 

This example shows how to display information about the number of VLANs configured on the device:

switch# show vlan summary

Number of existing VLANs           : 9

 Number of existing user VLANs     : 9

 Number of existing extended VLANs : 0

Related Commands

show vlan counters

To display the statistics for a specified VLAN or for all VLANs, use the show vlan counters command.

show vlan [id {vlan—id}] counters

Syntax Description

Defaults

None

Command Modes

Any command mode

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

This command displays the counters for all the VLANs, including the private VLANs, on the device.

If you omit the VLAN ID, the system displays statistics for all the VLANs on the device. This command displays:

•Transmitted and received unicast, multicast, and routed packets and octets

•Information about Layer 2, IPv4, and IPv6 unicast, multicast, and unknown packets and octets

Separate VLAN ranges with a hyphen, and separate VLANs with a comma and no spaces in between. For example, you can enter the following:

switch# show vlan id 1-4,3,7,5-20

This command does not require a license.

Examples

This example shows how to display statistics for VLAN 9:

switch(config)# show vlan id 9 counters

L2 IPv4 Unicast Octets              :0 

L2 IPv4 Unicast Packets             :0 

L2 IPv4 Multicast Octets            :0 

L2 IPv4 Multicast Packets           :0 

L2 IPv6 Unicast Octets              :0 

L2 IPv6 Unicast Packets             :0 

L2 IPv6 Multicast Octets            :0 

L2 IPv6 Multicast Packets           :0 

L2 Unicast Octets                   :25600000 

L2 Unicast Packets                  :400000 

L2 Broadcast Octets                 :12800000 

L2 Broadcast Packets                :200000 

L2 Unknown Unicast Octets           :19200000 

L2 Unknown Unicast Packets          :300000 

L3 Multicast Octets In              :0 

L3 Multicast Packets In             :0 

L3 Multicast Octets Out             :0 

L3 Multicast Packets Out            :0 

L3 Unicast Packets Out              :0 

Related Commands

show vlan dot1q tag native

To display the status of tagging on the native VLANs, use the show vlan dot1q tag native command.

show vlan dot1q tag native

Syntax Description

This command has no arguments or keywords.

Defaults

None

Command Modes

Any command mode

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

This command does not require a license.

Examples

This example shows how to display the status of native VLAN tagging on the device:

switch# show vlan dot1q tag native

vlan dot1q native tag is disabled

Related Commands

show vlan id

To display information and statistics for an individual VLAN or a range of VLANs, use the show vlan id command.

show vlan id [counters]

Syntax Description

Defaults

None

Command Modes

Any command mode

Supported User Roles

network-admin

vdc-admin

Command History

Usage Guidelines

Use this command to display information and statistics about an individual VLAN or a range of VLANs, including private VLANs.

When you use the counters argument, this command displays the following statistics for the individual VLAN or range of VLANs:

•Transmitted and received unicast, multicast, and routed packets and octets

•Information on Layer 2, IPv4, and IPv6 unicast, multicast, and unknown packets and octets

Note You can also display information about individual VLANs by using the show vlan name command.

This command does not require a license.

Examples

This example shows how to display information for VLAN 50:

---- -------------------------------- --------- -------------------------------

50   VLAN0050                         active    Eth2/6

Primary  Secondary  Type             Ports

-------  ---------  ---------------  -------------------------------------------

This example shows how to display statistics for VLAN 10:

switch(config)# show vlan id 10 counters

L2 IPv4 Unicast Octets              :0 

L2 IPv4 Unicast Packets             :0 

L2 IPv4 Multicast Octets            :0 

L2 IPv4 Multicast Packets           :0 

L2 IPv6 Unicast Octets              :0 

L2 IPv6 Unicast Packets             :0 

L2 IPv6 Multicast Octets            :0 

L2 IPv6 Multicast Packets           :0 

L2 Unicast Octets                   :25600000 

L2 Unicast Packets                  :400000 

L2 Broadcast Octets                 :12800000 

L2 Broadcast Packets                :200000 

L2 Unknown Unicast Octets           :19200000 

L2 Unknown Unicast Packets          :300000 

L3 Multicast Octets In              :0 

L3 Multicast Packets In             :0 

L3 Multicast Octets Out             :0 

L3 Multicast Packets Out            :0 

L3 Unicast Packets Out              :0 

Related Commands

show vlan private-vlan

To display private VLAN information, use the show vlan private-vlan command.

show vlan [id {vlan-id}] private-vlan [type]

Syntax Description