Priority Queue On Nexus

[dave cooper]

When you define a QOS policy on the Nexus and you have a priority queue do you have to allocate bandwith for this queue.

According to this QOS policy that was presented at Cisco Live it didn't reserve any bandwidth.

N5k(config)# policy-map type queuing policy-BW

N5k(config-pmap-que)# class type queuing class-1

N5k(config-pmap-c-que)# priority

N5k(config-pmap-c-que)# class type queuing class-2

N5k(config-pmap-c-que)# bandwidth percent 40

N5k(config-pmap-c-que)# class type queuing class-fcoe

N5k(config-pmap-c-que)# bandwidth percent 40

N5k(config-pmap-c-que)# class type queuing class-default

N5k(config-pmap-c-que)# bandwidth percent 20

Other QOS policies I see on the Internet do reserve the bandwidth for the priority queue, which is correct

[Akshit Dhingra]

You don't need to assign bandwidth to the priority queue since not matter what the bandwidth assigned to the priority queue is it will always be served first till the time priority queue is empty