[c-nsp] Nexus 7K - Routing over vPC Peer-link between chassis

[Nick Cutting]

I ran into this a few years back - and we did end up doing it.  It's basically because it peer link is totally different to a trunk between two chassis. i.e don't use it ever unless a downstream VPC link is down.


I can't remember the details, however this post by Brad Hedlund explains everything you need to know.

http://bradhedlund.com/2010/12/16/routing-over-nexus-7000-vpc-peer-link-yes-and-no/

-----Original Message-----
From: cisco-nsp [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Yham
Sent: 19 November 2015 11:49
To: cisco-nsp at puck.nether.net NSP
Subject: [c-nsp] Nexus 7K - Routing over vPC Peer-link between chassis

Hi All,

Could you please tell me what is the disadvantage of running routing protocols e.g. iBGP between SVIs of two chassis over vPC peer-link? I heard a lot that cisco recommend to use a separate link for layer-3 but why?

logically peer-link should be more reliable as generally it bundle with multiple physical links.

Thanks in advance.

Regards
YH
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