[c-nsp] Are Nexus and per-interface or FEX MTU settings possible?

Phil Mayers p.mayers at imperial.ac.uk
Thu Sep 20 05:17:40 EDT 2012


On 09/20/2012 07:20 AM, Reuben Farrelly wrote:

> policy-map type network-qos enable-jumbo-frames
>    class type network-qos class-default
>      mtu 9216
>
> system qos
>    service-policy type network-qos enable-jumbo-frames
>

Interesting.

Does anyone know the rationale behind this way of setting the MTU on ths 
platform? It seems a bit peculiar, and as you note, a too-high L2 MTU is 
seldom harmful, so you would think per-interface (or even per-device) 
would suffice.

FWIW N7k seems to work "normally" i.e. set physical interface & SVI MTU 
in the interface config.


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