Migrating Core Switch from Catalyst to nexus Switch using VPC protocol

[ravina-gurav]

Below is the VPC Configuration done on switch this switches are not in production yet But wanted tpoo know the type2 consistency issue may effect traffic.

Attach is both switch Vpc config

[Mark Elsen]

   - @ravina-gurav                 Check this document  : https://cordero.me/type-2-consistency-status-failed/
                                             Execute the diagnostic commands mentioned and read the explanations
                                                    This is a fatal error and it should be resolved first

  M.

[Htonieto]

Hello @ravina-gurav,

There are two types of inconsistency in vPC:

• Type 1, this will cause vPC to be suspended in case of mismatch.
• Type 2, is more a warn that something could be off (sometimes by design).

By the logs you shared, most probably you have different SVIs in each peer causing the inconsistency, you can validate that with the following command, check the Interface-vlan portion and compare Local with Peer values.

show vpc consistency-parameters global

[Giuseppe Larosa]

Hello @ravina-gurav ,

>> Type-2 inconsistency reason       : SVI type-2 configuration incompatible

This type of errors means that the number of SVI interface VLAN L3 associated to VLANs over the VPC is different on the two Nexus devices that form the VPC pair.

This kind of error does not impact on traffic and it can be easily fixed.

Compare the output of 

show ip int brief | inc lan

on both Nexus devices to find out the differences.

Hope to help

Giuseppe