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Monitoring CoS Scheduler Maps


Use the monitoring functionality to display assignments of CoS forwarding classes to schedulers.


To monitor CoS scheduler maps in the CLI, enter the CLI command:

user@switch> show class-of-service scheduler-map

To monitor a specific scheduler map in the CLI, enter the CLI command:

user@switch> show class-of-service scheduler-map scheduler-map-name


Table 1 summarizes key output fields for CoS scheduler maps.

Table 1: Summary of Key CoS Scheduler Maps Output Fields



Scheduler map

Name of a scheduler map that maps forwarding classes to schedulers.


Index of a specific object—scheduler maps, schedulers, or drop profiles.


Name of a scheduler that controls queue properties such as bandwidth and scheduling priority.

Forwarding class

Name(s) of the forwarding class(es) to which the scheduler is mapped.

Transmit rate

Guaranteed minimum bandwidth configured on the queue mapped to the scheduler. On strict-high priority queues on QFX10000 switches, defines the maximum amount of traffic on the queue that is treated as strict-high priority traffic.


Scheduling priority of traffic on a queue:

  • strict-high or high—Packets on a strict-high priority queue are transmitted first, before all other traffic, up to the configured maximum bandwidth (shaping rate). On QFX3500, QFX3600, EX4600, and OCX series switches, and on QFabric system, only one queue can be configured as strict-high or high priority. On QFX10000 switches, you can configure more than one strict-high priority queue.

  • low—Packets in this queue are transmitted after packets in the strict-high queue.

Drop Profiles

Name and index of a drop profile that is mapped to a specific loss priority and protocol pair. The drop profile determines the way best effort queues drop packets during periods of congestion.

Loss Priority

Packet loss priority mapped to the drop profile. You can configure different drop profiles for low, medium-high, and high loss priority traffic.


Transport protocol of the drop profile for the particular priority.


Name of the drop profile.