vPC and LAG Convergence

vPC and LAG Convergence

Thursday November 16, 2017

 

Recently Cisco released NXOS 7.0(3)I7(1) for the Nexus 9000 series switches. This brings two new features, called vPC Fast Convergence and LACP Convergence. These are also available on the 7000 series switches.

There wasn’t a lot of information readily available, so I’m going to share what I’ve learned here. I’d like to take a moment to thank Amith Ronad from Cisco for helping me to understand these features.

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Hitless vPC Role Change

Hitless vPC Role Change

Thursday October 19, 2017

 

“Always two there are; no more, no less. A vPC primary and a vPC secondary.”Yoda (paraphrased)

 

Like Yoda says, there has always been a primary and secondary in a vPC relationship. But, they’ve always been non-preemptive. That means that a secondary will not automatically become primary unless there’s a failure of some sort.

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