Nexus QoS Queuing

[legroseasy]

Hi,

I am just trying to figure out the output from the following command:

sh queuing interface e1/29

Ethernet1/29 queuing information:

  TX Queuing

    qos-group  sched-type  oper-bandwidth

        0       WRR             90

        5       priority        10

  RX Queuing

    qos-group 0

    q-size: 417600, HW MTU: 9216 (9216 configured)

    drop-type: drop, xon: 0, xoff: 417600

    Statistics:

        Pkts received over the port             : 215251141

        Ucast pkts sent to the cross-bar        : 214852927

        Mcast pkts sent to the cross-bar        : 398215

        Ucast pkts received from the cross-bar  : 196875328

        Pkts sent to the port                   : 199155394

        Pkts discarded on ingress               : 0

        Per-priority-pause status               : Rx (Inactive), Tx (Inactive)

    qos-group 5

    q-size: 22720, HW MTU: 1500 (1500 configured)

    drop-type: drop, xon: 0, xoff: 22720

    Statistics:

       Pkts received over the port             : 0

        Ucast pkts sent to the cross-bar        : 0

        Mcast pkts sent to the cross-bar        : 0

        Ucast pkts received from the cross-bar  : 57330822

        Pkts sent to the port                   : 57330863

        Pkts discarded on ingress               : 0

        Per-priority-pause status               : Rx (Inactive), Tx (Inactive)

On a RX queue, what does "receive over the port" and "sent to the port" means?  It's the RX queue, isn't suppose to receive packets only?  I just can't see the logic in that output.  This is the output from a FEX connection.

Thanks

Martin

[Jerry Ye]

How do you match the packets? And where are the policy applied to? Is this system? Or interface level?

This configuration looks like it is Nexus 5500.

Regards,

jerry

[legroseasy]

Hi Jerry,

Yes, it's a 5500 Nexus.

I apply the service-policy type qos directly on the port-channel use to connect the FEX.  I match the packets with an ACL and set qos-group 5 to it.  Queing is global and the same policy is use for in and out.

I am just trying trying to figure out how you can have "Pkts received over the port" and "Pkts sent to the port" on a RX queue?  What's the difference between the two?

Thanks

Martin

[Jerry Ye]

Service-policy type qos on the PO toward to the FEX is not supported for FEX fabric interface.

In a normal situation (when it is supported), "Pkts received over the port" is inbound traffic (RX) and I am not sure what is "Pkts sent to the port".

Regards,

jerry

[legroseasy]

Thanks Jerry