Possible to have more than two 5500 switches peered in a vPC?

[clayhawks]

We have successfully peered two 5548UP switches together and separately we have successfully peered two 5596UP switches together. Works great and is our standard going forward for data center switching. I've been casting about Google and Cisco looking for an answer to this question:

Is it possible to have more than two 5500 class Nexus switches participate in a peered vPC configuration? For instance, can I connect a single FEX to four 5500 class switches in a vPC configuration? The question is more academic than actionable. Even if the answer is yes we probably wouldn't be in a position to implement something like this for a while.

Thanks for any input!

[mikegrous · Accepted solution]

I am pretty sure you cannot do that. VPC is strickly between 2 switches.

[clayhawks]

Thanks. I thought as much and couldn't find any documentation to the contrary, but this forum is extremely useful at finding answers that are not found elsewhere. If I had the luxury of having more than two unused 5500 class switches to play with I would have tried it on my own.

Thanks!

[Reza Sharifi]

Yes, the max is 2

From the vPC design guide:

vPCs consist of two vPC peer switches connected by a peer link. Of the vPC peers, one is primary and one is

secondary. The system formed by the switches is referred to as a vPC domain.

Here is the vPC desgn guide:

http://www.cisco.com/en/US/prod/collateral/switches/ps9441/ps9670/design_guide_c07-625857.pdf

HTH