Cisco Nexus 5000 Series Nx-Os Layer 2 Switching Configuration Guide, Release 5.0(3)N1(1 - Cisco Nexus 5000 Series Configuration Manual

Compatibility Parameters for vPC Peer Links
You must ensure that all interfaces in the vPC have the identical operational and configuration parameters
Note
listed in this section.
Enter the show vpc consistency-parameters command to display the configured values on all interfaces
in the vPC. The displayed configurations are only those configurations that would limit the vPC peer link
and vPC from coming up.
The switch automatically check for compatibility of these parameters on the vPC interfaces. The per-interface
parameters must be consistent per interface, and the global parameters must be consistent globally.
• Port-channel mode: on, off, or active
• Link speed per channel
• Duplex mode per channel
• Trunk mode per channel:
• Spanning Tree Protocol (STP) mode
• STP region configuration for Multiple Spanning Tree (MST)
• Enable or disable state per VLAN
• STP global settings:
• STP interface settings:
• For the Fabric Extender vPC topology, all the interface level parameters mentioned above should be
identically configured for host interface from both the switches.
• Fabric Extender FEX number configured on an EtherChannel fabric interface; for the Fabric Extender
vPC toplogy.
If any of these parameters are not enabled or defined on either switch, the vPC consistency check ignores
those parameters.

Cisco Nexus 5000 Series NX-OS Layer 2 Switching Configuration Guide, Release 5.0(3)N1(1)

110
◦ Native VLAN
◦ VLANs allowed on trunk
◦ Tagging of native VLAN traffic
◦ Bridge Assurance setting
◦ Port type setting—We recommend that you set all vPC interfaces as normal ports
◦ Loop Guard settings
◦ Port type setting
◦ Loop Guard
◦ Root Guard
Configuring Virtual Port Channels