The documentation set for this product strives to use bias-free language. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. Learn more about how Cisco is using Inclusive Language.
To display interface switchport information, use the show interface switchport command.
show interface [if-identifier] switchport
if-identifier |
(Optional) Identifier of an interface. Examples are ethernet 3/22 or port channel 120. |
None
Any command mode
Supported User Roles
network-admin
vdc-admin
Release |
Modification |
---|---|
5.1(1) |
This command was introduced. |
This command does not require a license.
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#
Command |
Description |
---|---|
feature vtp |
Enables VTP on the device. |
vtp domain |
Configures the VTP domain name. |
vtp version |
Configures the VTP version. |
To display interface trunk information, use the show interface trunk command.
show interface [if-identifier] trunk
if-identifier |
(Optional) Identifier of an interface. Examples are ethernet 3/22 or port channel 120. |
None
Any command mode
Supported User Roles
network-admin
vdc-admin
Release |
Modification |
---|---|
5.1(1) |
This command was introduced. |
This command does not require a license.
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#
Command |
Description |
---|---|
feature vtp |
Enables VTP on the device. |
vtp domain |
Configures the VTP domain name. |
vtp version |
Configures the VTP version. |
To display information about specified VLANs, use the show interface vlan command.
show interface vlan vlan-id [ brief | description | private-vlan mapping | status ]
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. |
None
Any command mode
Supported User Roles
network-admin
vdc-admin
Release |
Modification |
---|---|
4.0 |
This command was introduced. |
4.2(1) |
Display of configured static MAC addresses for Layer 3 port channels added. |
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.
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
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. |
To display the statistics for a specified VLAN, use the show interface vlan counters command.
show interface vlan vlan-id counters [ detailed [all] | snmp ]
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 . |
None
Any command mode
Supported User Roles
network-admin
vdc-admin
Release |
Modification |
---|---|
4.0 |
This command was introduced. |
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.
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
Command |
Description |
---|---|
clear counters |
Clears counters on the interfaces. |
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 ]
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. |
None
Any command mode
Supported User Roles
network-admin
vdc-admin
Release |
Modification |
---|---|
4.0 |
This command was introduced. |
4.1.2 |
This command was enhanced to display vPC information. |
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.
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
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. |
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 ]
vlan vlan-id |
(Optional) Displays information for a specific VLAN only; the range of valid values is from 1 to 4094. |
None
Any command mode
Supported User Roles
network-admin
vdc-admin
Release |
Modification |
---|---|
4.0 |
This command was introduced. |
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.
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
Command |
Description |
---|---|
mac address-table aging-time |
Configures the aging time for entries in the Layer 2 table. |
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]
all |
(Optional) Displays current STP operating information including the default settings. |
None
Any command mode
Supported User Roles
network-admin
vdc-admin
Release |
Modification |
---|---|
4.0 |
This command was introduced. |
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.
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
Command |
Description |
---|---|
show spanning-tree |
Displays information about STP. |
To display the running configuration for a specified VLAN, use the show running-config vlan command.
show running-config vlan vlan-id
vlan-id |
Number of the VLAN or range of VLANs. Valid numbers range from 1 to 4096. |
None
Any command mode
Supported User Roles
network-admin
vdc-admin
Release |
Modification |
---|---|
4.0 |
This command was introduced. |
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.
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
Command |
Description |
---|---|
show vlan |
Displays information about all the VLANs on the device. |
To display the running configuration for the VLAN Trunking Protocol (VTP), use the show running-config vtp command.
show running-config vtp
This command has no arguments or keywords.
None
Any command mode
Supported User Roles
network-admin
vdc-admin
Release |
Modification |
---|---|
4.1(2) |
This command was introduced. |
This command provides information about VTP.
This command does not require a license.
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
Command |
Description |
---|---|
show vtp status |
Displays information about VTP on the device. |
To display information about the Spanning Tree Protocol (STP), use the show spanning-tree command.
show spanning-tree [ blockedports | inconsistentports | pathcost method ]
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.
|
None
Any command mode
Supported User Roles
network-admin
vdc-admin
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. |
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.
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:
|
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. |
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 ]
brief |
(Optional) Displays a brief summary of STP interface information. |
detail |
(Optional) Displays a detailed summary of STP interface information. |
None
Any command mode
Supported User Roles
network-admin
vdc-admin
Release |
Modification |
---|---|
4.0 |
This command was introduced. |
4.1.2 |
This command was enhanced to display vPC information. |
This command does not require a license.
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
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. |
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 ]
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. |
None
Any command mode
Supported User Roles
network-admin
vdc-admin
Release |
Modification |
---|---|
4.0 |
This command was introduced. |
This command does not require a license.
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
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. |
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]
active |
(Optional) Displays information about the STP active interfaces only . |
None
Any command mode
Supported User Roles
network-admin
vdc-admin
Release |
Modification |
---|---|
4.0 |
This command was introduced. |
4.1(2) |
This command was enhanced to display vPC information. |
This command does not require a license.
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
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. |
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]
active |
(Optional) Displays information about the STP active interfaces only . |
None
Any command mode
Supported User Roles
network-admin
vdc-admin
Release |
Modification |
---|---|
4.0 |
This command was introduced. |
4.1.2 |
This command was enhanced to display vPC information. |
This command does not require a license.
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
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. |
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 ]
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:
|
None
Any command mode
Supported User Roles
network-admin
vdc-admin
Release |
Modification |
---|---|
4.0 |
This command was introduced. |
4.1.2 |
This command was enhanced to display vPC information. |
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.
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
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. |
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] ]
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. |
None
Any command mode
Supported User Roles
network-admin
vdc-admin
Release |
Modification |
---|---|
4.0 |
This command was introduced. |
4.1.2 |
This command was enhanced to display vPC information. |
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.
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
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. |
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] ]
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. |
None
Any command mode
Supported User Roles
network-admin
vdc-admin
Release |
Modification |
---|---|
4.0 |
This command was introduced. |
This command does not require a license.
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
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. |
To display summary Spanning Tree Protocol (STP) information on the device, use the show spanning-tree summary command.
show spanning-tree summary [totals]
totals |
(Optional) Displays totals only of STP information. |
None
Any command mode
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. |
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.
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
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. |
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
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. |
None
Any command mode
Supported User Roles
network-admin
vdc-admin
Release |
Modification |
---|---|
4.0 |
This command was introduced. |
4.1.2 |
This command was enhanced to display vPC information. |
This command does not require a license.
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
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. |
To display VLAN configuration information in the startup configuration, use the show startup-config vlan command.
show startup-config vlan vlan-id
vlan-id |
Number of VLAN or range of VLANs. Valid numbers range from 1 to 4096. |
None
Any command mode
Supported User Roles
network-admin
vdc-admin
Release |
Modification |
---|---|
4.1(2) |
This command was introduced. |
This command does not require a license.
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
Command |
Description |
---|---|
show vlan |
Displays information about all the VLANs on the device. |
To display VLAN Trunking Protocol (VTP) configuration information in the startup configuration, use the show startup-config vtp command.
show startup-config vtp
This command has no arguments or keywords.
None
Any command mode
Release |
Modification |
---|---|
4.1(2) |
This command was introduced. |
This command does not require a license.
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
Command |
Description |
---|---|
show vtp status |
Displays information about VTP on the device. |
To display the system reserved VLAN range, use the show system vlan reserved command.
show system vlan reserved
This command has no arguments or keywords.
None
Any command mode
Supported User Roles
network-admin
network-operator
vdc-admin
vdc-operator
Release |
Modification |
---|---|
5.2(1) |
This command was introduced. |
This command does not require a license.
This example shows how to display the system reserved VLAN range:
switch# show system vlan reserved system current running vlan reservation: 3968-4095 switch#
Command |
Description |
---|---|
system vlan reserve |
Configures the reserved VLAN range. |
write erase all |
Reverts to the default reserved VLAN range. |
To display VLAN information, use the show vlan command.
show vlan [ all-ports | brief | name name | summary ]
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. |
None
Any command mode
Supported User Roles
network-admin
vdc-admin
Release |
Modification |
---|---|
5.1(1) |
Changed the command output. |
4.0 |
This command was introduced. |
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:
If you shut down a VLAN using the shutdown command, these values appear in the Status field:
If a VLAN is shut down internally, these values appear in the Status field:
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.
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
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. |
To display the statistics for a specified VLAN or for all VLANs, use the show vlan counters command.
show vlan [ id vlan-id ] counters
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. |
None
Any command mode
Supported User Roles
network-admin
vdc-admin
Release |
Modification |
---|---|
4.0 |
This command was introduced. |
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:
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.
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
Command |
Description |
---|---|
clear vlan counters |
Clears the counters for all or specified VLANs on the device. |
To display the status of tagging on the native VLANs, use the show vlan dot1q tag native command.
show vlan dot1q tag native
This command has no arguments or keywords.
None
Any command mode
Supported User Roles
network-admin
vdc-admin
Release |
Modification |
---|---|
4.0 |
This command was introduced. |
This command does not require a license.
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
Command |
Description |
---|---|
vlan dot1q tag native |
Enables 802.1Q tagging for all the VLANs in a trunk on the device. |
To display information and statistics for an individual VLAN or a range of VLANs, use the show vlan id command.
show vlan id [counters]
id |
Number of the VLAN or range of VLANs. The range is from 1 to 4096. |
counters |
Displays the statistics about specified VLANs. |
None
Any command mode
Supported User Roles
network-admin
vdc-admin
Release |
Modification |
---|---|
4.0 |
This command was introduced. |
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:
Note | You can also display information about individual VLANs by using the show vlan name command. |
This command does not require a license.
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
Command |
Description |
---|---|
clear vlan counters |
Clears the counters for all or specified VLANs on the device. |
To display private VLAN information, use the show vlan private-vlan command.
show vlan [ id vlan-id ] private-vlan [type]
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). |
None
Any command mode
Supported User Roles
network-admin
vdc-admin
Release |
Modification |
---|---|
4.0 |
This command was introduced. |
This command does not require a license.
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
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. |
To display the Virtual Trunking Protocol (VTP) statistics information, use the show vtp counter command.
show vtp counter
This command has no arguments or keywords.
None
Any command mode
Supported User Roles
network-admin
vdc-admin
Release |
Modification |
---|---|
5.1(1) |
This command was introduced. |
This command does not require a license.
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#
Command |
Description |
---|---|
feature vtp |
Enables VTP on the device. |
vtp domain |
Configures the VTP domain name. |
vtp version |
Configures the VTP version. |
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]
conflicts |
(Optional) Displays information about conflicts. |
None
Any command mode
Supported User Roles
network-admin
vdc-admin
Release |
Modification |
---|---|
7.1(1)D1(0) |
This command was introduced. |
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.
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
Command |
Description |
---|---|
feature vtp |
Enables VTP on the device. |
vtp version |
Configures the VTP version. |
To display the Virtual Trunking Protocol (VTP) interface status and configuration, use the show vtp interface command.
show vtp interface [if-identifier]
if-identifier |
(Optional) Identifier of an interface. Examples are ethernet 3/22 or port channel 120. |
None
Any command mode
Supported User Roles
network-admin
vdc-admin
Release |
Modification |
---|---|
5.1(1) |
This command was introduced. |
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.
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#
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. |
To display a Virtual Trunking Protocol (VTP) password, use the show vtp password command.
show vtp password
This command has no arguments or keywords.
None
Any command mode
Supported User Roles
network-admin
vdc-admin
Release |
Modification |
---|---|
5.1(1) |
This command was introduced. |
This command does not require a license.
This example shows how to display a VTP password on the device:
switch# show vtp password squ1rrel VTP password: switch#
Command |
Description |
---|---|
feature vtp |
Enables VTP on the device. |
vtp domain |
Configures the VTP domain name. |
vtp version |
Configures the VTP version. |
To display the Virtual Trunking Protocol (VTP) information, use the show vtp status command.
show vtp status
This command has no arguments or keywords.
None
Any command mode
Supported User Roles
network-admin
vdc-admin
Release |
Modification |
---|---|
4.1(2) |
This command was introduced. |
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.
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#
Command |
Description |
---|---|
feature vtp |
Enables VTP on the device. |
vtp domain |
Configures the VTP domain name. |
vtp version |
Configures the VTP version. |
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
This command has no arguments or keywords.
no shutdown
VLAN configuration submode
Supported User Roles
network-admin
vdc-admin
Release |
Modification |
---|---|
4.0 |
This command was introduced. |
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:
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.
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)#
Command |
Description |
---|---|
show vlan |
Displays VLAN information. |
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
module |
Module number that you are comparing with the supervisor MAC address table. |
None
Any command mode
Supported User Roles
network-admin
vdc-admin
Release |
Modification |
---|---|
4.1(2) |
This command was introduced. |
Optimally, all the MAC address tables on each module match the MAC address table on the supervisor.
This command does not require a license.
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
Command |
Description |
---|---|
show mac address-table |
Displays information about the 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 } ]
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 . |
None
Any command mode
Supported User Roles
network-admin
vdc-admin
Release |
Modification |
---|---|
4.0 |
This command was introduced. |
The fields are as follows:
Note | The RM and RMA fields are not supported on the Cisco Nexus 7000. Series device. |
This command does not require a license.
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
Command |
Description |
---|---|
show mac address-table |
Displays information about the MAC address table. |
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
type slot/port |
(Optional) T ype of interface, slot number, and port number. |
None
Any command mode
Supported User Roles
network-admin
vdc-admin
Release |
Modification |
---|---|
4.0 |
This command was introduced. |
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.
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
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. |
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
This command has no arguments or keywords.
None
Any command mode
Supported User Roles
network-admin
vdc-admin
Release |
Modification |
---|---|
4.0 |
This command was introduced. |
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.
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
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. |
To display interface trunk Virtual Trunking Protocol (VTP) pruning information, use the show interface pruning command.
show interface pruning
This command has no arguments or keywords.
None
Any command mode
Supported User Roles
network-admin
vdc-admin
Release |
Modification |
---|---|
5.1(1) |
This command was introduced. |
This command does not require a license.
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#
Command |
Description |
---|---|
feature vtp |
Enables VTP on the device. |
vtp domain |
Configures the VTP domain name. |
vtp version |
Configures the VTP version. |