7.6. Command Descriptions

This command creates a text description stored in the configuration file for a configuration context.

The description command associates a text string with a configuration context to help identify the context in the configuration file.

The no form of this command removes any description string from the context.

This command copies or overwrites existing network queue QoS policies to another network queue policy ID. It also allows bulk modifications to an existing policy with the use of the overwrite keyword.

This command creates a context to configure a network queue policy. Network queue policies on the Ethernet port define network egress queuing.

Network queue policies define the egress queuing for access-uplink ports.

The no form of this command removes the network-queue policy from use. However, the network queue with policy-name default cannot be modified or deleted.

This command configures a QoS network-queue policy queue.

The FCs are mapped to queues, as listed in Table 15. Only one FC can be mapped to one queue. A queue-id value of 8 is the highest priority and a queue-id value of 1 is the lowest priority. Network queues carry both the unicast and multicast traffic and no segregation is performed. The hardware port scheduler prioritizes the queue according to the priority for each queue. High priority traffic should be mapped to high-priority FCs. Mapping traffic to high-priority FCs does not guarantee high priority treatment, because the scheduler policy can influence the relative priority among the queues.

This command defines the method used by the system to derive the operational CIR and PIR settings when the queue is provisioned in hardware. For the CIR and PIR parameters individually, the system attempts to find the best operational rate depending on the defined constraint.

The no form of this command removes any explicitly defined constraints used to derive the operational CIR and PIR created by the application of the policy. When a specific adaptation-rule is removed, the default constraints for pir and cir apply.

This command is used to override the default slope-policy configuration for the queue. The specified slope-policy-name must exist as a current slope policy name. If the slope policy does not exist, the slope-policy command will fail. If a slope policy is currently associated with a queue, the slope policy cannot be removed from the system.

The slope policy contains High and Low slope definitions that will be used by the queue.

If the slope-policy command is not executed or the no slope policy command is executed, the default slope policy will be associated with the queue.

The no form of the command restores the default slope policy to the queue.

This command defines the PIR and the CIR parameters for the queue. The PIR defines the maximum rate at which the queue can transmit packets through the port. Defining a PIR does not necessarily guarantee that the queue can transmit at the intended rate. The actual rate sustained by the queue can be limited by over subscription factors or available egress bandwidth. The CIR defines the rate at which the system prioritizes the queue over other queues competing for the same bandwidth.

The rate command can be executed at any time, changing the PIR and CIR rates for all queues created on the access ports.

The no form of this command reverts all queues created with the queue-id by association with the QoS policy to the default PIR and CIR parameters.

This command displays network queue policy information.