All you need to do is put this configuration on all your nexus 5ks:
switch(config)#policy-map type network-qos jumbo
switch(config-pmap-nq)#class type network-qos class-default
switch(config-sys-qos)#service-policy type network-qos jumbo
This will globally enable jumbo frames.
To verify whether it works, do a "show int eth x/y", you should see the jumbo counters increasing.
Also note that the mtu won't change on the interface itself, its a global command, not a 'per interface' command. But thats ok, even if mtu says 1500 it can still accept jumbo frames if you have the global config applied.
Can I ask one question that sort of applies to this? Is it possible to setup jumbo frames on a Nexus 5010 by creating a new VLAN while still leaving the other VLANs on the switch without jumbo frames enabled? We'd like to use 10 GB connections with jumbo frames to our filer while using the 1 GB ports to connect to other devices. Any assistance would be appreciated.
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