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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