CNA QOS options?

[jconides]

My customer has ESXi servers with 2 CNA cards connected to Nexus 5K upstream switches. We will be using the 1000v for the Ethernet portion. Question is, what are QOS options for dividing bandwidth between FCOE and Ethernet traffic? Is there a default split?

Thanks,

John

[krun_shah · Accepted solution]

USe predefined policy maps. It matches frames with cos 3 and allocates 50% bandwidth for FCoE traffic and sets 2158 MTU to FCOE queue. If you are using Nexus 5000 it will automatically apply these policy-maps automatically when you enable feature fcoe.

service-policy type qos input fcoe-default-in-policy

service-policy type queuing input fcoe-default-in-policy

service-policy type queuing output fcoe-default-out-policy

service-policy type network-qos fcoe-default-nq-policy

NX5K01# sh policy-map fcoe-default-in-policy

  Type qos policy-maps

  ====================

  policy-map type qos fcoe-default-in-policy

    class type qos class-fcoe

      set qos-group 1

    class type qos class-default

      set qos-group 0

NX5K01# sh policy-map fcoe-default-in-policy

  Type qos policy-maps

  ====================

  policy-map type qos fcoe-default-in-policy

    class type qos class-fcoe

      set qos-group 1

    class type qos class-default

      set qos-group 0

NX5K01# sh policy-map type queu fcoe-default-in-policy

  Type queuing policy-maps

  ========================

  policy-map type queuing fcoe-default-in-policy

    class type queuing class-fcoe

      bandwidth percent 50

    class type queuing class-default

      bandwidth percent 50

NX5K01# sh policy-map type queu fcoe-default-out-policy

  Type queuing policy-maps

  ========================

  policy-map type queuing fcoe-default-out-policy

    class type queuing class-fcoe

      bandwidth percent 50

    class type queuing class-default

      bandwidth percent 50

NX5K01# sh policy-map type network fcoe-default-nq-policy

  Type network-qos policy-maps

  ===============================

  policy-map type network-qos fcoe-default-nq-policy

    class type network-qos class-fcoe

      pause no-drop

      mtu 2158

    class type network-qos class-default

      mtu 1500

      multicast-optimize