Cisco Nexus 5000 Series Nx-Os Layer 2 Switching Configuration Guide, Release 5.1(3)N1(1 - Cisco nexus 5000 series Configuration Manual

Dual Homed Fabric Extender vPC Configuration Example
Step 2
Create the vPC domain and add the vPC peer-keepalive link.
CiscoNexus-1(config)# vpc domain 1
CiscoNexus-1(config-vpc-domain)# peer-keepalive destination 10.10.10.237
CiscoNexus-1(config-vpc-domain)# exit
Step 3 Configure the vPC peer link as a two port Etherchannel.
CiscoNexus-1(config)# interface ethernet 1/1-2
CiscoNexus-1(config-if-range)# switchport mode trunk
CiscoNexus-1(config-if-range)# switchport trunk allowed vlan 20-50
CiscoNexus-1(config-if-range)# switchport trunk native vlan 20
CiscoNexus-1(config-if-range)# channel-group 20 mode active
CiscoNexus-1(config-if-range)# exit
CiscoNexus-1(config)# interface port-channel 20
CiscoNexus-1(config-if)# vpc peer-link
CiscoNexus-1(config-if)# exit
Step 4 Create a Fabric Extender identifier (for example, "100").
CiscoNexus-1(config)# fex 100
CiscoNexus-1(config-fex)# pinning max-links 1
CiscoNexus-1(fex)# exit
Step 5 Configure the fabric EtherChannel links for the Fabric Extender 100.
CiscoNexus-1(config)# interface ethernet 1/20
CiscoNexus-1(config-if)# channel-group 100
CiscoNexus-1(config-if)# exit
CiscoNexus-1(config)# interface port-channel 100
CiscoNexus-1(config-if)# switchport mode fex-fabric
CiscoNexus-1(config-if)# vpc 100
CiscoNexus-1(config-if)# fex associate 100
CiscoNexus-1(config-if)# exit
Step 6 Configure each host interface port on the Fabric Extender 100 on both Cisco Nexus devices as for all the other steps.
CiscoNexus-1(config)# interface ethernet 100/1/1-48
CiscoNexus-1(config-if)# switchport mode access
CiscoNexus-1(config-if)# switchport access vlan 50
CiscoNexus-1(config-if)# no shutdown
CiscoNexus-1(config-if)# exit
Step 7 Save the configuration.
CiscoNexus-1(config)# copy running-config startup-config
Repeat all the above steps for the CiscoNexus-2 switch.

Cisco Nexus 5000 Series NX-OS Layer 2 Switching Configuration Guide, Release 5.1(3)N1(1)

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Configuring Virtual Port Channels
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