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queue-num

Syntax

queue-num queue-number <no-loss>;

Hierarchy Level

Release Information

Statement introduced in Junos OS Release 11.1 for the QFX Series.

No-loss option introduced in Junos OS Release 12.3 for the QFX Series.

Description

Map a forwarding class to an output queue number. Optionally, configure the forwarding class as a lossless forwarding class.

You can map some or all of the eight unicast forwarding classes to a unicast queue (0 through 7) or some or all of the four multidestination (multicast, broadcast, destination lookup fail) forwarding classes to the same multidestination queue (8 through 11), providing that you do not map one forwarding class to more than one queue. The queue to which you map a forwarding class determines if the forwarding class is a unicast or multidestination forwarding class.

You cannot configure weighted random early detection (WRED) packet drop on forwarding classes configured with the no-loss packet drop attribute. Do not associate a drop profile with lossless forwarding classes.

Note: If you map more than one forwarding class to a queue, all of the forwarding classes mapped to the queue must to the same queue must have the same packet drop attribute (all of the forwarding classes must be lossy, or all of the forwarding classes mapped to a queue must be lossless).

Note: If you are using Junos OS Release 12.2, use the default forwarding-class-to-queue mapping for the lossless fcoe and no-loss forwarding classes. If you explicitly configure lossless forwarding classes, the traffic mapped to those forwarding classes is treated as lossy (best effort) traffic and does not receive lossless treatment.

If you are using Junos OS Release 12.3 or later, the default configuration is the same as the default configuration for Junos OS Release 12.2, and the default behavior is the same (the fcoe and no-loss forwarding classes receive lossless treatment). However, if you explicitly configure lossless forwarding classes, you can configure up to six lossless forwarding classes by specifying the no-loss option. If you do not specify the no-loss option in an explicit forwarding class configuration, the forwarding class is lossy. For example, if you explicitly configure the fcoe forwarding class and you do not include the no-loss option, the fcoe forwarding class is lossy, not lossless.

Options

queue-number—Number of the CoS unicast queue (0 through 7) or the CoS multidestination queue (8 through 11).

no-loss—Optional packet drop attribute keyword to configure the forwarding class as lossless.

Required Privilege Level

interfaces—To view this statement in the configuration.
interface-control—To add this statement to the configuration.

 

Related Documentation

 

Published: 2014-07-23

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