- 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 devices
- show vtp interface
- show vtp password
- show vtp status
- shutdown (VLAN configuration)
- show forwarding consistency l2
- show hardware mac address-table
- show interface mac-address
- show interface private-vlan mapping
- show interface pruning
Show Commands
- 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 devices
- show vtp interface
- show vtp password
- show vtp status
- shutdown (VLAN configuration)
- show forwarding consistency l2
- show hardware mac address-table
- show interface mac-address
- show interface private-vlan mapping
- show interface pruning
show interface switchport
To display interface switchport information, use the show interface switchport command.
show interface [if-identifier] switchport
Syntax Description
|
if-identifier |
(Optional) Identifier of an interface. Examples are ethernet 3/22 or port channel 120. |
Command Default
None
Command Modes
Any command mode
Supported User Roles
network-admin
vdc-admin
Command History
|
Release |
Modification |
|---|---|
|
5.1(1) |
This command was introduced. |
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 Name: Ethernet8/11 Switchport: Enabled Switchport Monitor: Not enabled Operational Mode: trunk 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 switch#
Related Commands
|
Command |
Description |
|---|---|
|
feature vtp |
Enables VTP on the device. |
|
vtp domain |
Configures the VTP domain name. |
|
vtp version |
Configures the VTP version. |
show interface trunk
To display interface trunk information, use the show interface trunk command.
show interface [if-identifier] trunk
Syntax Description
|
if-identifier |
(Optional) Identifier of an interface. Examples are ethernet 3/22 or port channel 120. |
Command Default
None
Command Modes
Any command mode
Supported User Roles
network-admin
vdc-admin
Command History
|
Release |
Modification |
|---|---|
|
5.1(1) |
This command was introduced. |
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 Native Status Port
Vlan Channel
--------------------------------------------------------------------------------
Eth1/33 1 trunking --
Eth1/34 1 trunking --
--------------------------------------------------------------------------------
Port Vlans Allowed on Trunk
--------------------------------------------------------------------------------
Eth1/33 1,10
Eth1/34 1,10
--------------------------------------------------------------------------------
Port Vlans Err-disabled on Trunk
--------------------------------------------------------------------------------
Eth1/33 none
Eth1/34 none
--------------------------------------------------------------------------------
Port STP Forwarding
--------------------------------------------------------------------------------
Eth1/33 1,10
Eth1/34 1,10
--------------------------------------------------------------------------------
Port VTP in spanning tree forwarding state and not pruned
--------------------------------------------------------------------------------
Eth1/33 1
Eth1/34 1
switch#
Related Commands
|
Command |
Description |
|---|---|
|
feature vtp |
Enables VTP on the device. |
|
vtp domain |
Configures the VTP domain name. |
|
vtp version |
Configures the VTP version. |
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
|
vlan-id |
Number of the VLAN. The range of values is from 1 to 4096. |
|
brief |
(Optional) Displays a brief description about a specified VLAN. |
|
description |
(Optional) Displays a detailed description about a specified VLAN. |
|
private-vlan mapping |
(Optional) Displays information about the private VLAN mapping, if any, for a specified VLAN. |
|
status |
(Optional) Displays information about the status for a specified VLAN. |
Command Default
None
Command Modes
Any command mode
Supported User Roles
network-admin
vdc-admin
Command History
|
Release |
Modification |
|---|---|
|
4.0 |
This command was introduced. |
|
4.2(1) |
Display of configured static MAC addresses for Layer 3 port channels added. |
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.
 Note | To display more statistics for the specified VLAN, use the show interface vlan counters and show vlan counters commands.To display more information about private VLANs, see the show interface private-vlan commands. |
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
Keepalive not supported
ARP type: ARPA
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
L3 Switched:
input: 0 pkts, 0 bytes - output: 0 pkts, 0 bytes
L3 in Switched:
ucast: 0 pkts, 0 bytes - mcast: 0 pkts, 0 bytes
L3 out Switched:
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 ------------------------------------------------------------------------------- Vlan5 -- down none This example shows how to display the description for a specified VLAN: switch# show interface vlan 100 description ------------------------------------------ Interface Description ------------------------------------------ Vlan100
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 Interface Secondary VLAN --------- ---------------------------------------------------------------- vlan200 201 202
This example shows how to display the status for a specified VLAN:
switch# show interface vlan 5 status ------------------------------------------ Interface Status Protocol ------------------------------------------ Vlan5 admin down shut
Related Commands
|
Command |
Description |
|---|---|
|
show interface switchport |
Displays information about the switch ports, including those configured for private VLANs, |
|
show interface vlan counters |
Displays the statistics for VLANs. |
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
|
vlan-id |
VLAN or range of VLANs for which you want to display statistics . The range is from 1 to 4096. |
|
detailed |
(Optional) Displays nonzero counters for the specified interface. |
|
all |
(Optional) Displays all the detailed information for the particular VLAN, including statistics per byte . |
|
snmp |
(Optional) Displays the MIB values . |
Command Default
None
Command Modes
Any command mode
Supported User Roles
network-admin
vdc-admin
Command History
|
Release |
Modification |
|---|---|
|
4.0 |
This command was introduced. |
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 -------------------------------------------------------------------------------- Vlan9 0 0 0 -- -------------------------------------------------------------------------------- Port OutOctets OutUcastPkts OutMcastPkts OutBcastPkts -------------------------------------------------------------------------------- Vlan9 0 0 0 --
This example shows how to display only the nonzero counters for a specified VLAN:
switch# show interface vlan 2 counters detailed Vlan2 counters: 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 Vlan9 counters: 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 23. l3_ucast_pkts_in = 0 24. l3_mcast_bytes_in = 0 25. l3_mcast_pkts_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 ------------------------------------------------------------------------------- Vlan9 0 0 0 -- ------------------------------------------------------------------------------- Port OutOctets OutUcastPkts OutMcastPkts OutBcastPkts ------------------------------------------------------------------------------- Vlan9 0 0 0 -- 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
|
Command |
Description |
|---|---|
|
clear counters |
Clears counters on the interfaces. |
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
|
num |
(Optional) MAC address table for a specified module.
|
||
|
dynamic |
(Optional) Displays information about the dynamic MAC address table entries only. |
||
|
static |
(Optional) Displays information about the static MAC address table entries only. |
||
|
address mac-address |
(Optional) Displays information about the MAC address table for a specific MAC address. |
||
|
count |
(Optional) Displays the number of MAC address entries for dynamic and static. |
||
|
interface type slot/port |
(Optional) Specifies the interface. Use either t he type of interface, the slot number, or the port number. |
||
|
port-channel number |
(Optional) Specifies the port-channel number. The range is from 1 to 4096. |
||
|
vlan vlan-id |
(Optional) Displays information for a specific VLAN only; the range of valid values is from 1 to 4094. |
Command Default
None
Command Modes
Any command mode
Supported User Roles
network-admin
vdc-admin
Command History
|
Release |
Modification |
|---|---|
|
4.0 |
This command was introduced. |
|
4.1.2 |
This command was enhanced to display vPC information. |
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. |
The show mac address-table command is enhanced to display information about MAC addresses on virtual port channels (vPCs). See the Cisco NX-OS Interfaces Configuration Guide for information on vPCs.
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
Legend:
* - 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 when you have enabled and configured the vPC feature:
switch# show mac address-table
Legend:
* - primary entry, G - Gateway MAC, (R) - Routed MAC
age - seconds since last seen
VLAN MAC Address Type age Secure NTFY Ports
---------+-----------------+--------+---------+------+------+----------------
G - 0018.bad8.447d static - False False sup-eth1(R)
* 1 0000.0300.0300 dynamic 0 False False Eth1/2
* 1 0000.0300.0301 dynamic 0 False False Eth1/2
* 1 0000.0300.0302 dynamic 0 False False Eth1/2
* 1 0000.0300.0303 dynamic 0 False False Eth1/2
* 1 0000.0300.0304 dynamic 0 False False Eth1/2
2 ac00.0000.0021 dynamic 0 False False VPC Peer-Link
2 ac00.0000.0022 dynamic 0 False False VPC Peer-Link
2 ac00.0000.0023 dynamic 0 False False VPC Peer-Link
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
Legend:
* - 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
Legend:
* - 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
Legend:
* - 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
Legend:
* - 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
Legend:
* - 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
Legend:
* - 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
|
Command |
Description |
|---|---|
|
mac address-table static |
Adds static entries to the MAC address table or configures a static MAC address with IGMP snooping disabled for that address. |
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
|
vlan vlan-id |
(Optional) Displays information for a specific VLAN only; the range of valid values is from 1 to 4094. |
Command Default
None
Command Modes
Any command mode
Supported User Roles
network-admin
vdc-admin
Command History
|
Release |
Modification |
|---|---|
|
4.0 |
This command was introduced. |
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 Vlan Aging Time ---- ---------- 1 1800 50 1200 100 1800
Related Commands
|
Command |
Description |
|---|---|
|
mac address-table aging-time |
Configures the aging time for entries in the Layer 2 table. |
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
|
all |
(Optional) Displays current STP operating information including the default settings. |
Command Default
None
Command Modes
Any command mode
Supported User Roles
network-admin
vdc-admin
Command History
|
Release |
Modification |
|---|---|
|
4.0 |
This command was introduced. |
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 spanning-tree mode mst
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 spanning-tree mode mst 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 name revision 0 instance 0 vlan 1-4094 configure interface Ethernet8/1 spanning-tree port-priority 128
Related Commands
|
Command |
Description |
|---|---|
|
show spanning-tree |
Displays information about STP. |
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
|
vlan-id |
Number of the VLAN or range of VLANs. Valid numbers range from 1 to 4096. |
Command Default
None
Command Modes
Any command mode
Supported User Roles
network-admin
vdc-admin
Command History
|
Release |
Modification |
|---|---|
|
4.0 |
This command was introduced. |
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 settings.
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 version 4.0(1) vlan 50
Related Commands
|
Command |
Description |
|---|---|
|
show vlan |
Displays information about all the VLANs on the device. |
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.
Command Default
None
Command Modes
Any command mode
Supported User Roles
network-admin
vdc-admin
Command History
|
Release |
Modification |
|---|---|
|
4.1(2) |
This command was introduced. |
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 version 4.1(2) feature vtp vtp mode transparent vtp domain accounting
Related Commands
|
Command |
Description |
|---|---|
|
show vtp status |
Displays information about VTP on the device. |
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
|
blockedports |
(Optional) Displays the alternate ports blocked by STP. |
||
|
inconsistentports |
(Optional) Displays the ports that are in an inconsistent STP state. |
||
|
pathcost method |
(Optional) Displays whether the short or long path-cost method is used.
|
Command Default
None
Command Modes
Any command mode
Supported User Roles
network-admin
vdc-admin
Command History
|
Release |
Modification |
|---|---|
|
4.0 |
This command was introduced. |
|
4.1(3) |
This command was enhanced to display when a port is part of a virtual port channel (vPC). |
|
4.1.2 |
This command was enhanced to display vPC information. |
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
VLAN0001
Spanning tree enabled protocol rstp
Root ID Priority 32769
Address 000d.eca3.9f01
Cost 4
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)
Address 0022.5579.7641
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
VLAN0002
Spanning tree enabled protocol rstp
Root ID Priority 32770
Address 000d.eca3.9f01
Cost 4
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)
Address 0022.5579.7641
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
VLAN0003
Spanning tree enabled protocol rstp
Root ID Priority 32771
Address 000d.eca3.9f01
Cost 4
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)
Address 0022.5579.7641
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
VLAN0004
Spanning tree enabled protocol rstp
Root ID Priority 32772
Address 000d.eca3.9f01
Cost 4
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)
Address 0022.5579.7641
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
MST0000
Spanning tree enabled protocol mstp
Root ID Priority 32768
Address 0018.bad8.fc150
Cost 0
Port 258 (Ethernet 2/2)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32768 (priority 32768 sys-id-ext 0)
Address 0018.bad8.239d
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 -------------------- ------------------------------------ VLAN0001 Eth8/2 VLAN0002 Eth8/2 VLAN0003 Eth8/2 VLAN0004 Eth8/2 VLAN0005 Eth8/2 VLAN0006 Eth8/2 VLAN0007 Eth8/2 VLAN0008 Eth8/2 VLAN0009 Eth8/2 VLAN0010 Eth8/2
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)
show spanning-tree describes the fields that are shown in the examples.
|
Field |
Definition and Options |
|---|---|
|
Role |
Current port STP role. Valid values are as follows:
|
|
State |
Current port STP state. Valid values are as follows:
|
|
Type |
Status information; valid values are as follows:
|
Related Commands
|
Command |
Description |
|---|---|
|
show spanning-tree mst |
Displays information about the MST STP. |
|
show spanning-tree active |
Displays information about the STP active interfaces only. |
|
show spanning-tree bridge |
Displays the bridge ID, timers, and protocol for the local bridge on the device. |
|
show spanning-tree brief |
Displays a brief summary of STP information. |
|
show spanning-tree detail |
Displays detailed information about STP. |
|
show spanning-tree interface |
Displays the STP interface status and configuration of specified interfaces. |
|
show spanning-tree root |
Displays the status and configuration of the root bridge for the STP instance to which this device belongs. |
|
show spanning-tree summary |
Displays summary information about STP. |
|
show spanning-tree vlan |
Displays STP information about specified VLANs. |
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
|
brief |
(Optional) Displays a brief summary of STP interface information. |
|
detail |
(Optional) Displays a detailed summary of STP interface information. |
Command Default
None
Command Modes
Any command mode
Supported User Roles
network-admin
vdc-admin
Command History
|
Release |
Modification |
|---|---|
|
4.0 |
This command was introduced. |
|
4.1.2 |
This command was enhanced to display vPC information. |
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
VLAN0001
Spanning tree enabled protocol rstp
Root ID Priority 32769
Address 000d.eca3.9f01
Cost 4
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)
Address 0022.5579.7641
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
VLAN0002
Spanning tree enabled protocol rstp
Root ID Priority 32770
Address 000d.eca3.9f01
Cost 4
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)
Address 0022.5579.7641
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
VLAN0003
Spanning tree enabled protocol rstp
Root ID Priority 32771
Address 000d.eca3.9f01
Cost 4
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)
Address 0022.5579.7641
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
VLAN0004
Spanning tree enabled protocol rstp
Root ID Priority 32772
Address 000d.eca3.9f01
Cost 4
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)
Address 0022.5579.7641
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
|
Command |
Description |
|---|---|
|
show spanning-tree mst |
Displays information about the MST STP. |
|
show spanning-tree |
Displays information about STP. |
|
show spanning-tree bridge |
Displays the bridge ID, timers, and protocol for the local bridge on the device. |
|
show spanning-tree brief |
Displays a brief summary of STP information. |
|
show spanning-tree detail |
Displays detailed information about STP. |
|
show spanning-tree interface |
Displays the STP interface status and configuration about specified interfaces. |
|
show spanning-tree root |
Displays the status and configuration of the root bridge for the STP instance to which this device belongs. |
|
show spanning-tree summary |
Displays summary information about STP. |
|
show spanning-tree vlan |
Displays STP information about specified VLANs. |
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
|
address |
(Optional) Displays the MAC address for the STP local bridge. |
|
brief |
(Optional) Displays a brief summary of the status and configuration for the STP bridge. |
|
detail |
(Optional) Displays a detailed summary of the status and configuration for the STP bridge. |
|
forward-time |
(Optional) Displays the STP forward delay interval for the bridge. |
|
hello-time |
(Optional) Displays the STP hello time for the bridge. |
|
id |
(Optional) Displays the STP bridge identifier for the bridge. |
|
max-age |
(Optional) Displays the STP maximum-aging time for the bridge. |
|
priority |
(Optional) Displays the bridge priority for this bridge. |
|
system-id |
(Optional) Displays the bridge priority with the system ID extension for this bridge. |
|
protocol |
(Optional) Displays which STP protocol is active, Rapid Per VLAN Spanning Tree (Rapid PVST+) or Multiple Spanning Tree (MST) on the device. |
Command Default
None
Command Modes
Any command mode
Supported User Roles
network-admin
vdc-admin
Command History
|
Release |
Modification |
|---|---|
|
4.0 |
This command was introduced. |
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
Hello Max Fwd
MST Instance Bridge ID Time Age Dly Protocol
---------------- --------------------------------- ----- --- --- --------
MST0000 32768 (32768,0) 0018.bad7.fc15 2 20 15 mstp
Related Commands
|
Command |
Description |
|---|---|
|
show spanning-tree mst |
Displays information about the MST STP. |
|
show spanning-tree |
Displays information about STP. |
|
show spanning-tree active |
Displays information about the STP active interfaces only. |
|
show spanning-tree brief |
Displays a brief summary of STP information. |
|
show spanning-tree detail |
Displays detailed information about STP. |
|
show spanning-tree interface |
Displays the STP interface status and configuration of specified interfaces. |
|
show spanning-tree root |
Displays the status and configuration of the root bridge for the STP instance to which this device belongs. |
|
show spanning-tree summary |
Displays summary information about STP. |
|
show spanning-tree vlan |
Displays STP information about specified VLANs. |
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
|
active |
(Optional) Displays information about the STP active interfaces only . |
Command Default
None
Command Modes
Any command mode
Supported User Roles
network-admin
vdc-admin
Command History
|
Release |
Modification |
|---|---|
|
4.0 |
This command was introduced. |
|
4.1(2) |
This command was enhanced to display vPC information. |
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
VLAN0001
Spanning tree enabled protocol rstp
Root ID Priority 32769
Address 000d.eca3.9f01
Cost 4
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)
Address 0022.5579.7641
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
VLAN0002
Spanning tree enabled protocol rstp
Root ID Priority 32770
Address 000d.eca3.9f01
Cost 4
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)
Address 0022.5579.7641
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
|
Command |
Description |
|---|---|
|
show spanning-tree mst |
Displays information about the MST STP. |
|
show spanning-tree |
Displays information about STP. |
|
show spanning-tree active |
Displays information about the STP active interfaces only. |
|
show spanning-tree bridge |
Displays the bridge ID, timers, and protocol for the local bridge on the device. |
|
show spanning-tree detail |
Displays detailed information about STP. |
|
show spanning-tree interface |
Displays the STP interface status and configuration of specified interfaces. |
|
show spanning-tree root |
Displays the status and configuration of the root bridge for the STP instance to which this device belongs. |
|
show spanning-tree summary |
Displays summary information about STP. |
|
show spanning-tree vlan |
Displays STP information about specified VLANs. |
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
|
active |
(Optional) Displays information about the STP active interfaces only . |
Command Default
None
Command Modes
Any command mode
Supported User Roles
network-admin
vdc-admin
Command History
|
Release |
Modification |
|---|---|
|
4.0 |
This command was introduced. |
|
4.1.2 |
This command was enhanced to display vPC information. |
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
from port-channel10
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
BPDU: sent 0, received 0
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
BPDU: sent 0, received 0
Related Commands
|
Command |
Description |
|---|---|
|
show spanning-tree mst |
Displays information about the MST STP. |
|
show spanning-tree |
Displays information about STP. |
|
show spanning-tree active |
Displays information about the STP active interfaces only. |
|
show spanning-tree bridge |
Displays the bridge ID, timers, and protocol for the local bridge on the device. |
|
show spanning-tree brief |
Displays brief summary information about STP. |
|
show spanning-tree interface |
Displays the STP interface status and configuration about specified interfaces. |
|
show spanning-tree root |
Displays the status and configuration of the root bridge for the STP instance to which this device belongs. |
|
show spanning-tree summary |
Displays summary information about STP. |
|
show spanning-tree vlan |
Displays STP information about specified VLANs. |
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
|
ethernet slot/port |
Displays the Ethernet interface and slot or port number. The range is from 1 to 253. |
|
port-channel channel-number |
Port channel number. The range is from 1 to 4096. |
|
active |
(Optional) Displays information about the STP active interfaces only on the specified interfaces. |
|
brief |
(Optional) Displays a brief summary about the specified STP interfaces . |
|
detail |
(Optional) Displays detailed information about the specified STP interfaces . |
|
cost |
(Optional) Displays the STP path cost for the specified interfaces. |
|
edge |
(Optional) Displays the STP-type edge port information for the specified interfaces. |
|
inconsistency |
(Optional) Displays the port STP inconsistency state for the specified interfaces. |
|
priority |
(Optional) Displays the STP port priority for the specified interfaces. |
|
rootcost |
(Optional) Displays the path cost to the root for specified interfaces. |
|
state |
Current port STP state. Valid values are as follows:
|
Command Default
None
Command Modes
Any command mode
Supported User Roles
network-admin
vdc-admin
Command History
|
Release |
Modification |
|---|---|
|
4.0 |
This command was introduced. |
|
4.1.2 |
This command was enhanced to display vPC information. |
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
|
Command |
Description |
|---|---|
|
show spanning-tree mst |
Displays information about the MST STP. |
|
show spanning-tree |
Displays information about STP. |
|
show spanning-tree active |
Displays information about the STP active interfaces only. |
|
show spanning-tree bridge |
Displays the bridge ID, timers, and protocol for the local bridge on the device. |
|
show spanning-tree brief |
Displays brief summary information about STP. |
|
show spanning-tree detail |
Displays detailed information about STP. |
|
show spanning-tree root |
Displays the status and configuration of the root bridge for the STP instance to which this device belongs. |
|
show spanning-tree summary |
Displays summary information about STP. |
|
show spanning-tree vlan |
Displays STP information about specified VLANs. |
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] ]
Syntax Description
|
instance-id |
(Optional) MST instance that you want to display. |
|
detail |
(Optional) Displays detailed MST information. |
|
interface |
Displays the interface or range of interfaces that you want to display. |
|
ethernet slot/port |
Displays the Ethernet interface and slot or port number. The range is from 1 to 253. |
|
port-channel channel-number |
Displays the port-channel number. The range is from 1 to 4096. |
|
configuration |
(Optional) Displays current MST regional information. Displays VLAN-to-instance mapping of all VLANs. |
|
digest |
(Optional) Displays information about the MD5 digest. |
Command Default
None
Command Modes
Any command mode
Supported User Roles
network-admin
vdc-admin
Command History
|
Release |
Modification |
|---|---|
|
4.0 |
This command was introduced. |
|
4.1.2 |
This command was enhanced to display vPC information. |
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
Name: [mst-bldg-sj6/3]
Revision: 1 Instances Configured: 3
Instance Vlans mapped
--------- --------------------------------------------------
0 1
2000 2-2000
4094 2001-4094
----------------------------------------------------------------
This example shows how to display the MD5 digest included in the current MST configuration:
switch)# show spanning-tree mst configuration digest Name [mst-config] Revision 10 Instances configured 25 Digest 0x40D5ECA178C657835C83BBCB16723192 Pre-std Digest 0x27BF112A75B72781ED928D9EC5BB4251
Related Commands
|
Command |
Description |
|---|---|
|
show spanning-tree |
Displays information about STP. |
|
show spanning-tree active |
Displays information about the STP active interfaces only. |
|
show spanning-tree bridge |
Displays the bridge ID, timers, and protocol for the local bridge on the device. |
|
show spanning-tree brief |
Displays brief summary information about STP. |
|
show spanning-tree detail |
Displays detailed information about STP. |
|
show spanning-tree interface |
Displays the STP interface status and configuration of specified interfaces. |
|
show spanning-tree root |
Displays the status and configuration of the root bridge for the STP instance to which this device belongs. |
|
show spanning-tree summary |
Displays summary information about STP. |
|
show spanning-tree vlan |
Displays STP information about specified VLANs. |
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
|
address |
(Optional) Displays the MAC address for the STP root bridge. |
|
brief |
(Optional) Displays a brief summary of the status and configuration for the the root bridge. |
|
cost |
(Optional) Displays the path cost from the root to this bridge. |
|
detail |
(Optional) Displays detailed information about the status and configuration for the root bridge. |
|
forward-time |
(Optional) Displays the STP forward delay interval for the root bridge. |
|
hello-time |
(Optional) Displays the STP hello time for the root bridge. |
|
id |
(Optional) Displays the STP bridge identifier for the root bridge. |
|
max-age |
(Optional) Displays the STP maximum-aging time for the root bridge. |
|
port |
(Optional) Displays which port is the root port. |
|
priority |
(Optional) Displays the bridge priority for the root bridge. |
|
system-id |
(Optional) Displays the bridge identifier with the system ID extension for the root bridge. |
Command Default
None
Command Modes
Any command mode
Supported User Roles
network-admin
vdc-admin
Command History
|
Release |
Modification |
|---|---|
|
4.0 |
This command was introduced. |
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
|
Command |
Description |
|---|---|
|
show spanning-tree mst |
Displays information about the MST STP. |
|
show spanning-tree |
Displays information about STP. |
|
show spanning-tree active |
Displays information about the STP active interfaces only. |
|
show spanning-tree bridge |
Displays the bridge ID, timers, and protocol for the local bridge on the device. |
|
show spanning-tree brief |
Displays a brief summary about STP information. |
|
show spanning-tree detail |
Displays detailed information about STP. |
|
show spanning-tree interface |
Displays the STP interface status and configuration of specified interfaces. |
|
show spanning-tree summary |
Displays summary information about STP. |
|
show spanning-tree vlan |
Displays STP information about specified VLANs. |
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
|
totals |
(Optional) Displays totals only of STP information. |
Command Default
None
Command Modes
Any command mode
Command History
|
Release |
Modification |
|---|---|
|
5.2(1) |
Updated the example to display information for STP-lite. For more information about STP-lite, see the Cisco NX-OS FCoE Configuration Guide for Cisco Nexus 7000 and Cisco MDS 9500. |
|
4.0 |
This command was introduced. |
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 ---------------------- -------- --------- -------- ---------- ---------- VLAN0001 1 0 0 1 2 VLAN0002 2 0 0 0 2 VLAN0003 2 0 0 0 2 ---------------------- -------- --------- -------- ---------- ---------- 3 vlans 5 0 0 1 6 STP-lite running in the following VLAN instances ------------------------------------------------ VLAN0002 VLAN0003
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) Root bridge for: MST0000 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 ---------------------- -------- --------- -------- ---------- ---------- MST0000 0 0 0 2 2 ---------------------- -------- --------- -------- ---------- ---------- 1 mst 0 0 0 2 2
Related Commands
|
Command |
Description |
|---|---|
|
show spanning-tree mst |
Displays information about the MST STP. |
|
show spanning-tree |
Displays information about STP. |
|
show spanning-tree active |
Displays information about the STP active interfaces only. |
|
show spanning-tree bridge |
Displays the bridge ID, timers, and protocol for the local bridge on the device. |
|
show spanning-tree brief |
Displays a brief summary about STP information. |
|
show spanning-tree detail |
Displays detailed information about STP. |
|
show spanning-tree interface |
Displays the STP interface status and configuration of specified interfaces. |
|
show spanning-tree root |
Displays the status and configuration of the root bridge for the STP instance to which this device belongs. |
|
show spanning-tree vlan |
Displays STP information about specified VLANs. |
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 [ b rief | 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
|
vlan-id |
VLAN or range of VLANs that you want to display. The range is from 1 to 4096. |
|
active |
(Optional) Displays information on STP VLANs and active ports. |
|
brief |
(Optional) Displays a brief summary of STP information for the specified VLANs. |
|
detail |
(Optional) Displays detailed STP information for the specified VLANs. |
|
blockedports |
(Optional) Displays the STP alternate ports in the blocked state for the specified VLANs. |
|
bridge |
(Optional) Displays the status and configuration of the bridge for the specified VLANs. |
|
address |
(Optional) Displays the MAC address for the specified STP bridge for the specified VLANs. |
|
forward-time |
(Optional) Displays the STP forward delay interval for the bridge for the specified VLANs. |
|
hello-time |
(Optional) Displays the STP hello time for the bridge for the specified VLANs. |
|
id |
(Optional) Displays the STP bridge identifier for the specified VLANs. |
|
max-age |
(Optional) Displays the STP maximum-aging time for the specified VLANs. |
|
priority |
(Optional) Displays the STP priority for the specified VLANs. |
|
system-id |
(Optional) Displays the bridge identification with the system ID added for the specified VLANs. |
|
protocol |
(Optional) Displays which STP protocol is active on the device. |
|
inconsistentports |
(Optional) Displays the ports that are in an inconsistent STP state for specified VLANs. |
|
ethernet slot/port |
Displays the Ethernet interface and slot or port number. The range is from 1 to 253. |
|
port-channel channel-number |
Displays the port channel interface. The range is from 1 to 4096. |
|
cost |
(Optional) Displays the STP path cost for the specified VLANs. |
|
edge |
(Optional) Displays the STP-type edge port information for the specified interface for the specified VLANs. |
|
inconsistency |
(Optional) Displays the STP port inconsistency state for the specified interface for the specified VLANs. |
|
priority |
(Optional) Displays the STP priority for the specified VLANs. |
|
rootcost |
(Optional) Displays the path cost to the root for specified interfaces for the specified VLANs. |
|
state |
Current port STP state. Valid values are as follows:
|
|
port |
(Optional) Displays information about the root port for the specified VLANs, |
|
summary |
(Optional) Displays summary STP information about the specified VLANs. |
Command Default
None
Command Modes
Any command mode
Supported User Roles
network-admin
vdc-admin
Command History
|
Release |
Modification |
|---|---|
|
4.0 |
This command was introduced. |
|
4.1.2 |
This command was enhanced to display vPC information. |
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
VLAN0004
Spanning tree enabled protocol rstp
Root ID Priority 32772
Address 000d.eca3.9f01
Cost 4
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)
Address 0022.5579.7641
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
|
Command |
Description |
|---|---|
|
show spanning-tree mst |
Displays information about the MST STP. |
|
show spanning-tree |
Displays information about STP. |
|
show spanning-tree active |
Displays information about the STP active interfaces only. |
|
show spanning-tree bridge |
Displays the bridge ID, timers, and protocol for the local bridge on the device. |
|
show spanning-tree brief |
Displays brief summary information about STP. |
|
show spanning-tree detail |
Displays detailed information about STP. |
|
show spanning-tree interface |
Displays the STP interface status and configuration of specified interfaces. |
|
show spanning-tree root |
Displays the status and configuration of the root bridge for the STP instance to which this device belongs. |
|
show spanning-tree summary |
Displays summary information about STP. |
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
|
vlan-id |
Number of VLAN or range of VLANs. Valid numbers range from 1 to 4096. |
Command Default
None
Command Modes
Any command mode
Supported User Roles
network-admin
vdc-admin
Command History
|
Release |
Modification |
|---|---|
|
4.1(2) |
This command was introduced. |
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 version 4.1(2) vlan 1 ip arp inspection vlan 1
Related Commands
|
Command |
Description |
|---|---|
|
show vlan |
Displays information about all the VLANs on the device. |
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.
Command Default
None
Command Modes
Any command mode
Command History
|
Release |
Modification |
|---|---|
|
4.1(2) |
This command was introduced. |
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 version 4.1(2) feature vtp vtp mode transparent vtp domain accounting
Related Commands
|
Command |
Description |
|---|---|
|
show vtp status |
Displays information about VTP on the device. |
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.
Command Default
None
Command Modes
Any command mode
Supported User Roles
network-admin
network-operator
vdc-admin
vdc-operator
Command History
|
Release |
Modification |
|---|---|
|
5.2(1) |
This command was introduced. |
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 switch#
Related Commands
|
Command |
Description |
|---|---|
|
system vlan reserve |
Configures the reserved VLAN range. |
|
write erase all |
Reverts to the default reserved VLAN range. |
show vlan
To display VLAN information, use the show vlan command.
show vlan [ all-ports | brief | name name | summary ]
Syntax Description
|
all-ports |
(Optional) Displays all ports on VLANs. |
|
brief |
(Optional) Displays only a single line for each VLAN, naming the VLAN, status, and ports. |
|
name name |
(Optional) Displays information about a single VLAN that is identified by the VLAN name; valid values are an ASCII string fro m 1 to 32 char acters. |
|
summary |
(Optional) Displays the number of existing VLANs on the device. |
Command Default
None
Command Modes
Any command mode
Supported User Roles
network-admin
vdc-admin
Command History
|
Release |
Modification |
|---|---|
|
5.1(1) |
Changed the command output. |
|
4.0 |
This command was introduced. |
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:
switch# show vlan
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Eth5/1, Eth5/2, Eth5/3, Eth5/4
Eth5/5, Eth5/6, Eth5/7, Eth5/8
Eth5/9, Eth5/10, Eth5/11
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
Eth7/1
10 VLAN0010 active
VLAN Type Vlan-mode
---- ----- ----------
1 enet CE
10 enet FABRICPATH
Remote SPAN VLANs
-------------------------------------------------------------------------------
Primary Secondary Type Ports
------- --------- --------------- -------------------------------------------
switch#
This example shows how to display the VLANs and all ports for each VLAN:
switch#
show vlan all-ports
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Po5, Po37, Po50, Eth2/1, Eth2/2
Eth2/3, Eth2/5, Eth2/7, Eth2/8
Eth2/9, Eth2/10, Eth2/15
Eth2/21, Eth2/22, Eth2/23
Eth2/24, Eth2/25, Eth2/26
Eth2/27, Eth2/28, Eth2/46
Eth2/47, Eth2/48
5 VLAN0005 active
6 VLAN0006 active
7 VLAN0007 active
8 test active
9 VLAN0009 active
10 VLAN0010 active
50 VLAN0050 active Eth2/6
100 trunked active
200 VLAN0200 active
201 VLAN0201 active
202 VLAN0202 active
This example shows how to display the VLAN name, status, and associated ports only:
switch#
show vlan brief
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Eth2/5, Eth2/7, Eth2/8, Eth2/9
Eth2/10, Eth2/15, Eth2/47
Eth2/48
5 VLAN0005 active
6 VLAN0006 active
7 VLAN0007 active
8 test active
9 VLAN0009 active
10 VLAN0010 active
50 VLAN0050 active Eth2/6
100 trunked active.
This example shows how to display the VLAN information for a specific VLAN by name:
switch# show vlan name test VLAN Name Status Ports ---- -------------------------------- --------- ------------------------------- 8 test active VLAN Type ---- ----- 8 enet Remote SPAN VLAN ---------------- Disabled 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
|
Command |
Description |
|---|---|
|
show interface switchport |
Displays information about the switch ports, including those switch ports in private VLANs, |
|
show vlan private-vlan |
Displays private VLAN information. |
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
|
id |
(Optional) Displays the VLAN ID that you want to clear . |
|
vlan-id |
Number of the VLAN that you want to clear . The range is from 1 to 4096. |
Command Default
None
Command Modes
Any command mode
Supported User Roles
network-admin
vdc-admin
Command History
|
Release |
Modification |
|---|---|
|
4.0 |
This command was introduced. |
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 Vlan Id :10 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 Multicast Octets :0 L2 Multicast Packets :0 L2 Broadcast Octets :12800000 L2 Broadcast Packets :200000 L2 Unknown Unicast Octets :19200000 L2 Unknown Unicast Packets :300000 L3 Routed Octets In :0 L3 Routed Packets In :0 L3 Routed Octets Out :0 L3 Routed Packets Out :0 L3 Multicast Octets In :0 L3 Multicast Packets In :0 L3 Multicast Octets Out :0 L3 Multicast Packets Out :0 L3 Unicast Octets In :0 L3 Unicast Packets In :0 L3 Unicast Octets Out :0 L3 Unicast Packets Out :0
Related Commands
|
Command |
Description |
|---|---|
|
clear vlan counters |
Clears the counters for all or specified VLANs on the device. |
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.
Command Default
None
Command Modes
Any command mode
Supported User Roles
network-admin
vdc-admin
Command History
|
Release |
Modification |
|---|---|
|
4.0 |
This command was introduced. |
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
|
Command |
Description |
|---|---|
|
vlan dot1q tag native |
Enables 802.1Q tagging for all the VLANs in a trunk on the device. |
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
|
id |
Number of the VLAN or range of VLANs. The range is from 1 to 4096. |
|
counters |
Displays the statistics about specified VLANs. |
Command Default
None
Command Modes
Any command mode
Supported User Roles
network-admin
vdc-admin
Command History
|
Release |
Modification |
|---|---|
|
4.0 |
This command was introduced. |
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:
switch# show vlan id 50 VLAN Name Status Ports ---- -------------------------------- --------- ------------------------------- 50 VLAN0050 active Eth2/6 VLAN Type ---- ----- 50 enet Remote SPAN VLAN ---------------- Disabled Primary Secondary Type Ports ------- --------- --------------- -------------------------------------------
This example shows how to display statistics for VLAN 10:
switch(config)# show vlan id 10 counters Vlan Id :10 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 Multicast Octets :0 L2 Multicast Packets :0 L2 Broadcast Octets :12800000 L2 Broadcast Packets :200000 L2 Unknown Unicast Octets :19200000 L2 Unknown Unicast Packets :300000 L3 Routed Octets In :0 L3 Routed Packets In :0 L3 Routed Octets Out :0 L3 Routed Packets Out :0 L3 Multicast Octets In :0 L3 Multicast Packets In :0 L3 Multicast Octets Out :0 L3 Multicast Packets Out :0 L3 Unicast Octets In :0 L3 Unicast Packets In :0 L3 Unicast Octets Out :0 L3 Unicast Packets Out :0
Related Commands
|
Command |
Description |
|---|---|
|
clear vlan counters |
Clears the counters for all or specified VLANs on the device. |
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
|
id |
(Optional) Displays the VLAN or range of VLANs. The range is from 1 to 4096. |
|
vlan-id |
(Optional) Private VLAN information for the specified VLAN. The range is from 1 to 4096. |
|
type |
(Optional) Displays the private VLAN type (primary, isolated, or community). |
Command Default
None
Command Modes
Any command mode
Supported User Roles
network-admin
vdc-admin
Command History
|
Release |
Modification |
|---|---|
|
4.0 |
This command was introduced. |
Usage Guidelines
This command does not require a license.
Examples
This example shows how to display information about all private VLANs on the device:
switch(config)# show vlan private-vlan Primary Secondary Type Ports ------- --------- --------------- ------------------------ 200 201 isolated Eth2/26, Eth2/27 200 202 community Eth2/26, Eth2/28
This example shows how to display information for a specific private VLAN:
switch(config)# show vlan id 202 private-vlan Primary Secondary Type Ports ------- --------- --------------- --------------------------- 200 202 community Eth2/26, Eth2/28
This example shows how to display information about the types of all private VLANs on the device:
switch(config)# show vlan private-vlan type Vlan Type ---- ----------------- 200 primary 201 isolated 202 community
This example shows how to display information on the type for the specified private VLAN:
switch(config)# show vlan id 202 private-vlan type Vlan Type ---- ----------------- 202 community
Related Commands
|
Command |
Description |
|---|---|
|
show interface switchport |
Displays information about the switch ports, including those switch ports in private VLANs. |
|
show interface private-vlan mapping |
Displays information about the private VLAN mapping between the primary and secondary VLANs so that both VLANs share the same primary VLAN interface. |
|
show vlan |
Displays information about all the VLANs on the device. |
show vtp counter
To display the Virtual Trunking Protocol (VTP) statistics information, use the show vtp counter command.
show vtp counter
Syntax Description
This command has no arguments or keywords.
Command Default
None
Command Modes
Any command mode
Supported User Roles
network-admin
vdc-admin
Command History
|
Release |
Modification |
|---|---|
|
5.1(1) |
This command was introduced. |
Usage Guidelines
This command does not require a license.
Examples
This example shows how to display statistics information about VTP on the device:
switch# show vtp counter
VTP statistics:
Summary advertisements received : 544
Subset advertisements received : 270
Request advertisements received : 0
Summary advertisements transmitted : 260
Subset advertisements transmitted : 5
Request advertisements transmitted : 274
Number of config revision errors : 0
Number of config digest errors : 270
Number of V1 summary errors : 0
VTP pruning statistics:
Trunk Join Transmitted Join Received Summary advts received from
non-pruning-capable device
---------------- ---------------- ---------------- ---------------------------
Ethernet1/31 12977 12982 542
switch#
Related Commands
|
Command |
Description |
|---|---|
|
feature vtp |
Enables VTP on the device. |
|
vtp domain |
Configures the VTP domain name. |
|
vtp version |
Configures the VTP version. |
show vtp devices
To display information about all VLAN Trunking Protocol (VTP) version 3 devices in the domain, use the show vtp devices command.
show vtp devices [conflicts]
Syntax Description
|
conflicts |
(Optional) Displays information about conflicts. |
Command Default
None
Command Modes
Any command mode
Supported User Roles
network-admin
vdc-admin
Command History
|
Release |
Modification |
|---|---|
|
7.1(1)D1(0) |
This command was introduced. |
Usage Guidelines
The show vtp devices displays information about all VTP version 3 devices in the domain. The optional conflicts keyword displays information about VTP version 3 devices with conflicting primary servers.
The show vtp devices command does not display information when the switch is in transparent or off mode.
This command does not require a license.
Examples
This example shows how to display information about all VTP version 3 devices in the domain:
switch# show vtp devices
Gathering information from the domain, please wait.
VTP Database Conf switch ID Primary Server Revision System Name
lict
------------ ---- -------------- -------------- ---------- ----------------------
VLAN Yes 00b0.8e50.d000 000c.0412.6300 12354 main.cisco.com
MST No 00b0.8e50.d000 0004.AB45.6000 24 main.cisco.com
VLAN Yes 000c.0412.6300=000c.0412.6300 67 qwerty.cisco.com
Related Commands
|
Command |
Description |
|---|---|
|
feature vtp |
Enables VTP on the device. |
|
vtp version |
Configures the VTP version. |
show vtp interface
To display the Virtual Trunking Protocol (VTP) interface status and configuration, use the show vtp interface command.
show vtp interface [if-identifier]
Syntax Description
|
if-identifier |
(Optional) Identifier of an interface. Examples are ethernet 3/22 or port channel 120. |
Command Default
None
Command Modes
Any command mode
Supported User Roles
network-admin
vdc-admin
Command History
|
Release |
Modification |
|---|---|
|
5.1(1) |
This command was introduced. |
Usage Guidelines
If a single interface is specified, the information for that interface alone is presented to the user; otherwise, the command applies to all currently active interfaces.
This command does not require a license.
Examples
This example shows how to display the VTP interface status and configuration on the device:
switch# show vtp interface ethernet 3/22 Interface VTP Status -------------------------------- Ethernet3/22 Enabled switch# switch# show vtp interface Interface VTP Status -------------------------------- Ethernet1/8 Enabled Ethernet3/2 Disabled Ethernet3/22 Enabled switch#
Related Commands
|
Command |
Description |
|---|---|
|
show vtp counters |
Displays VTP statistics information. |
|
show interface pruning |
Displays interface trunk VTP pruning information. |
|
show interface counters |
Displays information about the statistics for the specified VLANs. |
show vtp password
To display a Virtual Trunking Protocol (VTP) password, use the show vtp password command.
show vtp password
Syntax Description
This command has no arguments or keywords.
Command Default
None
Command Modes
Any command mode
Supported User Roles
network-admin
vdc-admin
Command History
|
Release |
Modification |
|---|---|
|
5.1(1) |
This command was introduced. |
Usage Guidelines
This command does not require a license.
Examples
This example shows how to display a VTP password on the device:
switch# show vtp password squ1rrel VTP password: switch#
Related Commands
|
Command |
Description |
|---|---|
|
feature vtp |
Enables VTP on the device. |
|
vtp domain |
Configures the VTP domain name. |
|
vtp version |
Configures the VTP version. |
show vtp status
To display the Virtual Trunking Protocol (VTP) information, use the show vtp status command.
show vtp status
Syntax Description
This command has no arguments or keywords.
Command Default
None
Command Modes
Any command mode
Supported User Roles
network-admin
vdc-admin
Command History
|
Release |
Modification |
|---|---|
|
4.1(2) |
This command was introduced. |
Usage Guidelines
This command is not available if VTP is not enabled.
Note | You cannot enable or configure VTP pruning or V2 modes. |
This command does not require a license.
Examples
This example shows how to display information about VTP on the device:
switch# show vtp status VTP Status Information ---------------------- VTP Version : 2 (capable) Configuration Revision : 1 Maximum VLANs supported locally : 1005 Number of exisiting VLANs : 17 VTP Operating Mode : Server VTP Domain Name : VTP Pruning Mode : Disabled (Operationally Disabled) VTP V2 Mode : Disabled MD5 Digest : 0x8D 0x0D 0xB4 0xE8 0xC3 0x3C 0x7F 0x99 Configuration last modified by 0.0.0.0 at 6-30-10 18:05:13 VTP version running : 1 switch#
Related Commands
|
Command |
Description |
|---|---|
|
feature vtp |
Enables VTP on the device. |
|
vtp domain |
Configures the VTP domain name. |
|
vtp version |
Configures the VTP version. |
shutdown (VLAN configuration)
To shut down the local traffic on a VLAN, use the shutdown command. To return a VLAN to its default operational state, use the no form of this command.
shutdown
no shutdown
Syntax Description
This command has no arguments or keywords.
Command Default
no shutdown
Command Modes
VLAN configuration submode
Supported User Roles
network-admin
vdc-admin
Command History
|
Release |
Modification |
|---|---|
|
4.0 |
This command was introduced. |
Usage Guidelines
You cannot shut down, or disable, VLAN 1 or VLANs 1006 to 4094.
Once you shut down a VLAN, the traffic ceases to flow on that VLAN. Access ports on that VLAN are also brought down; trunk ports continue to carry traffic for the other VLANs allowed on that port. However, the interface associations for the specified VLAN remain, and when you reenable, or recreate, that specified VLAN, the device automatically reinstates all the original ports to that VLAN.
To find out if a VLAN has been shut down internally, check the Status field in the show vlan command output. If a VLAN is shut down internally, one of these values appears in the Status field:
- act/lshut—VLAN status is active and shut down internally.
- sus/lshut—VLAN status is suspended and shut down internally.
Note | If the VLAN is suspended and shut down, you use both the no shutdown and state active commands to return the VLAN to the active state. |
This command does not require a license.
Examples
This example shows how to restore local traffic on VLAN 2 after you have shut down, or disabled, the VLAN:
switch(config)# vlan 2 switch(config-vlan)# no shutdown switch(config-vlan)#
Related Commands
|
Command |
Description |
|---|---|
|
show vlan |
Displays VLAN information. |
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
|
module |
Module number that you are comparing with the supervisor MAC address table. |
Command Default
None
Command Modes
Any command mode
Supported User Roles
network-admin
vdc-admin
Command History
|
Release |
Modification |
|---|---|
|
4.1(2) |
This command was introduced. |
Usage Guidelines
Optimally, all the MAC address tables on each module 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 for 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
|
Command |
Description |
|---|---|
|
show mac address-table |
Displays information about the MAC address table. |
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
|
module |
Module number. |
|
address macaddress |
(Optional) Specifies the MAC address in the format of X.X.X, XX-XX-XX-XX-XX-XX, XX:XX:XX:XX:XX:XX, XXXX.XXXX.XXXX. |
|
interface |
(Optional) Specifies the interface. |
|
ethernet slot/port |
Displays the Ethernet interface. Use either t he type of interface, the slot number, or the port number. The range is from 1 to 253. |
|
port-channel channel-number |
Displays the port channel interface and port-channel number. The range is from 1 to 4096. |
|
vlan vlan-id |
(Optional) Specifies the VLAN number . |
|
dynamic |
(Optional) Specifies dynamic entries only . |
|
static |
(Optional) Specifies static entries only . |
Command Default
None
Command Modes
Any command mode
Supported User Roles
network-admin
vdc-admin
Command History
|
Release |
Modification |
|---|---|
|
4.0 |
This command was introduced. |
Usage Guidelines
The fields are as follows:
- Valid—Entry is valid in the 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 the last notification. This value is set when index value changes.
- Age byte—Age timer value when the 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—Gateway MAC address.
- 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 trap bit MAC address.
- NTFY—Notify bit. 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 device. |
- Capture bit—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 bit 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
|
Command |
Description |
|---|---|
|
show mac address-table |
Displays information about the MAC address table. |
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
|
type slot/port |
(Optional) T ype of interface, slot number, and port number. |
Command Default
None
Command Modes
Any command mode
Supported User Roles
network-admin
vdc-admin
Command History
|
Release |
Modification |
|---|---|
|
4.0 |
This command was introduced. |
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
|
Command |
Description |
|---|---|
|
show mac address-table |
Displays information about the MAC address table. |
|
mac address-table static |
Adds static entries to the MAC-address table or configures a static MAC address with IGMP snooping disabled for that address. |
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.
Command Default
None
Command Modes
Any command mode
Supported User Roles
network-admin
vdc-admin
Command History
|
Release |
Modification |
|---|---|
|
4.0 |
This command was introduced. |
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 --------- -------------- ----------------- vlan200 201 isolated vlan200 202 community
Related Commands
|
Command |
Description |
|---|---|
|
show interface switchport |
Displays information about the switchports, including those in private VLANs. |
|
show vlan private-vlan |
Displays information about all private VLANs on the device. |
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 arguments or keywords.
Command Default
None
Command Modes
Any command mode
Supported User Roles
network-admin
vdc-admin
Command History
|
Release |
Modification |
|---|---|
|
5.1(1) |
This command was introduced. |
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 Ethernet1/33 10 Ethernet1/34 10 Port Vlan traffic requested of neighbor Ethernet1/33 1 <<<<< Ethernet1/34 1 <<<<< switch#
Related Commands
|
Command |
Description |
|---|---|
|
feature vtp |
Enables VTP on the device. |
|
vtp domain |
Configures the VTP domain name. |
|
vtp version |
Configures the VTP version. |
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