This example shows how to configure a pure vPC peer switch topology:
switch# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
switch(config)# vpc domain 5
switch(config-vpc-domain)# peer-switch
2010 Apr 28 14:44:44 switch %STP-2-VPC_PEERSWITCH_CONFIG_ENABLED: vPC peer-switch
configuration is enabled. Please make sure to configure spanning tree "bridge" priority as
per recommended guidelines to make vPC peer-switch operational.
switch(config-vpc-domain)# exit
switch(config)# spanning-tree vlan 1 priority 8192
switch(config)# show spanning-tree summary
Switch is in rapid-pvst mode
Root bridge for: VLAN0001-VLAN0050, VLAN0100-VLAN0149, VLAN0200-VLAN0249
VLAN0300-VLAN0349, VLAN0400-VLAN0599, VLAN0900-VLAN0999
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
vPC peer-switch is enabled (operational)
Name Blocking Listening Learning Forwarding STP Active
---------------------- -------- --------- -------- ---------- ----------
VLAN0001 0 0 0 16 16
VLAN0002 0 0 0 16 16
switch(config)# copy running-config startup-config
switch(config)#
Configuring a Hybrid vPC Peer Switch Topology
You can configure a hybrid vPC and non-vPC peer switch topology by using the spanning-tree
pseudo-information command to change the designated bridge ID so that it meets the STP VLAN-based
load-balancing criteria and then change the root bridge ID priority to a value that is better than the best bridge
priority. You then enable the peer switch. For more information, see the command reference for your device.
If you previously configured global spanning tree parameters and you subsequently configure spanning
tree pseudo information parameters, be aware that the pseudo information parameters take precedence
over the global parameters.
Note
Before You Begin
Ensure that you have enabled the vPC feature.
Procedure
PurposeCommand or Action
Enters global configuration mode.switch# configure terminal
Step 1
Configures the spanning tree pseudo information.switch(config)# spanning-tree
pseudo-information
Step 2
This configuration takes precedence over any
global spanning tree configurations.
Note
Cisco Nexus 5000 Series NX-OS Interfaces Configuration Guide, Release 5.2(1)N1(1)
94 78-26881-OL
Configuring Virtual Port Channels
Configuring a Hybrid vPC Peer Switch Topology
