Configuring Vpcs - Cisco nexus 5000 series Configuration Manual

Configuring vPCs

• A Fabric Extender can be a member of a Host Interface vPC topology or a Fabric Extender vPC topology
• You must configure both vPC peer switches; the configuration is not automatically synchronized between
• 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
• You cannot have a link for non-vPC traffic in parallel with a vPC topology. This can cause errors with
• You cannot configure non-vPC interfaces across host ports on two different FEXs.
Configuring vPCs
Enabling vPCs
You must enable the vPC feature before you can configure and use vPCs.
SUMMARY STEPS
1. switch# configure terminal
2. switch(config)# feature vpc
3. (Optional) switch# show feature
4. (Optional) switch# copy running-config startup-config
DETAILED STEPS
Command or Action
Step 1 switch# configure terminal
Step 2 switch(config)# feature vpc
Step 3 switch# show feature
Cisco Nexus 5000 Series NX-OS Layer 2 Switching Configuration Guide, Release 5.1(3)N1(1)
116
but not both simultaneously.
the vPC peer devices.
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.
the traffic forwarding logic resulting in duplicate or missed packets.
Purpose
Enters global configuration mode.
Enables vPCs on the switch.
(Optional)
Displays which features are enabled on the switch.
Configuring Virtual Port Channels
OL-25842-01