Thursday, April 5, 2018

Cisco Nexus-to-Nexus dual-VPC interconnect - topology help?

Since a picture speaks 1000 words...

https://i.imgur.com/bj2PvYy.png

Which of the two VPC configurations in that picture is best, blue or red?

I'm thinking Blue, since while a single switch failure in either option is bad, in the blue option only ~10Gb of traffic would have to transit the VPC peer-link (in theory). A single switch failure in Red would result in potentially 20Gb of traffic needing to transit the peer-link, right?

(No, this is not homework, this is an actual thing I'm doing at the office and just wanted to double-check myself.)



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