• A Fabric Extender can be a member of a Host Interface vPC topology or a Fabric Extender vPC topology
but not both simultaneously.
• You must configure both vPC peer switches; the configuration is not automatically synchronized between
the vPC peer devices.
• Check that the necessary configuration parameters are compatible on both sides of the vPC peer link.
• You may experience minimal traffic disruption while configuring vPCs.
• You should configure all the port channels in the vPC using LACP with the interfaces in active mode.
• When the peer-switch command is configured and vPC keepalive messages exchanged through an SVI
instead of a management interface, additional Spanning Tree Protocol (STP) configuration is required.
STP needs to be disabled on the dedicated link that carries the keepalive traffic between the vPC peers.
You can disable STP on the dedicated link by configuring STP BPDUfilter on the both ends of the
dedicated link. We recommend that the VLAN of the vPC keepalive SVI be allowed on only the
interconnecting dedicated link and disallowed on all other links, including the peer link.
Configuring vPCs
Enabling vPCs
You must enable the vPC feature before you can configure and use vPCs.
Procedure
PurposeCommand or Action
Enters configuration mode.switch# configure terminal
Step 1
Enables vPCs on the switch.switch(config)# feature vpc
Step 2
(Optional)
Displays which features are enabled on the
switch.
switch# show feature
Step 3
(Optional)
Copies the running configuration to the startup
configuration.
switch# copy running-config
startup-config
Step 4
This example shows how to enable the vPC feature:
switch# configure terminal
switch(config)# feature vpc
Disabling vPCs
You can disable the vPC feature.
Cisco Nexus 5000 Series NX-OS Interfaces Configuration Guide, Release 5.2(1)N1(1)
80 78-26881-OL
Configuring Virtual Port Channels
Configuring vPCs
