10GB Port & Jumbo Frames

[zekebashi]

Hello, 

I was wondering if someone could shed a light on whether jumbo frames should be configured on an 10GB interface or not really required. 

Thanks in advance. 

Best, ~zK 

[Joseph W. Doherty]

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Posting

Jumbos are more optimal on 10g because of the bandwidth.

The only real downside to configure jumbos is if you might have something using jumbos, and it hits a L3 interface that doesn't support them, so then the interface will drop or fragment.

[zekebashi]

Thanks for the info., Joseph! 

[Carlos Villagran]

Hi!

The decision of using Jumbos or not is not about bandwidth matter. Jumbos are used for deployments with certain protocols like iSCSI and it should be considered only for special purposes, remember that if a host is not compatible with Jumbo frames it will drop the frame anyways and even worst as Joseph just said, in case you are trying to route those in a not capable jumbo frame interface it will start fragmenting a lot and thus you will have high CPU after some minutes causing even worst scenarios. 

Hope it helps, best regards!

JC

[zekebashi]

Thanks for the feedback, Carols.