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Class of Service

  • HCoS interoperability support (PTX10008 with the PTX10K-LC1301-36DD line card)—By default, PTX10008 routers boot with PTX10K-LC1301-36DD line cards in interop mode. This mode does not support hierarchical class of service (HCoS) configuration on the PTX10K-LC1301-36DD line card. To enable HCoS on this line card, run the set chassis interoperability express5-enhanced command. Commit the change and reboot the router. After the reboot, the PTX10008 with the PTX10K-LC1301-36DD line card supports HCoS configuration.

    [See Hierarchical Class of Service Overview.]

  • Per-queue accounting of ECN packets (PTX10002-36QDD)—Counters on explicit congestion notification (ECN)-enabled queues increment when the queues experience congestion or receive packets that encountered congestion on another device. You can view these per-queue ECN accounting statistics using the show interfaces queue command.

    PTX10002-36QDD routers support ECN counters only in non-hierarchical CoS (non-HCoS) mode. To enable non-HCoS mode on PTX10002-36QDD routers, run the set class-of-service options hierarchical-scheduler-disable command. Then commit the change and reboot the router.

    [See ECN Packets per Queue and show interfaces queue.]