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Webcast-Catalyst9k
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Etherchannel between a server and 2 switches

I have a customer who has a switch with channel groups set up. Each server has 4 nics going to their 3560 and there is a channel group set up for each server. They want to add another 3560. Can I spread the channel groups across the 2 switches? So each server will have 2 connections to each switch?

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Re: Etherchannel between a server and 2 switches

Etherchannel to one server should not be and cannot be spread across 2 switches. If the server happens to use the same MAC and IP address on all 4 ports , it would cause switches to report mac address flapping. Etherchannel is point to point technology.

But if you want to create 2 separate etherchannel to 2 different switches , that should be fine. e.g 2 ports on a server is in 1 port channel and going to 1 switch and 2 ports in a separate channel going to a second switch is fine. One channel should not be spread across 2 different switches.

Hope this helps.

Salman Z.

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