Nexux 3k VPC Spanning tree issue

[G3000LEE]

I think I have spanning-tree issues with the Nexus 3k Switches using VPC.

The problem we are having, when one of the four switches is rebooted (see diagram), all connections to the other switches go down. 

Any help would be appreciated. 

[Sergiu.Daniluk · Accepted solution]

Hi @G3000LEE 

The problem is present if ANY of them reboots? Or only if a specific one reboots?

Can you share the vpc and stp config from the 4 switches?

Cheers,

Sergiu