Cards (Cli Procedure) - Juniper JUNOS OS 10.4 - FOR EX REV 1 Manual

Configuring CoS Traffic Classification for Ingress Queuing on 40-port SFP+ Line Cards
(CLI Procedure)
Copyright © 2010, Juniper Networks, Inc.
Packets arriving on a port in the 40-port SFP+ line card in an EX8200 switch are directed
to either a high priority or a low priority class-of-service (CoS) ingress queue. These
queues are used for scheduling traffic from the port group into the Packet Forwarding
Engine. The fabric priority associated with the packet's forwarding class determines
which queue the packet is sent to. The forwarding class of the packet in turn is determined
by the behavior aggregate (BA) classifier assigned to the port.
By default, the fabric priority of all forwarding classes is low. Thus all packets, with the
exception of critical network packets, are sent to the low priority ingress queue by default.
This procedure describes how you can direct high priority traffic into the high priority
ingress queue and thus avoid congestion at the port group.
To direct traffic to the high priority ingress queue for a port group:
Create the BA classifier for the forwarding class:
1.
[edit class-of-service]
user@switch# set classifiers classifier-type classifier-name
forwarding-class class-name loss-priority
Assign a queue number and fabric priority to the forwarding class:
2.
[edit class-of-service]
user@switch# set forwarding-classes class class-name queue-num number
priority level
Assign the BA classifier to the physical interface:
3.
[edit class-of-service]
user@switch# set interfaces interface-name unit 0
classifiers classifier-type classifier-name
For example, to direct voice traffic to the high-priority ingress queue for interface
[edit class-of-service]
user@switch# set classifiers dscp dscp1 forwarding-class cos-voice
loss-priority low code-points ef
[edit class-of-service]
user@switch# set forwarding-classes class cos-voice queue-num 5 priority high
[edit class-of-service]
user@switch# set interfaces xe-1/0/2 unit 0 classifiers dscp dscp1
NOTE: You must use a BA classifier to classify traffic for ingress queuing.
Multifield (MF) classification and port classification (that is, assigning a
forwarding class to the interface) are not supported for classifying traffic for
ingress queuing. The BA classifier must be assigned to a physical interface,
not a Layer 3 tagged interface or a routed VLAN interface (RVI).
Chapter 115: Configuring CoS
level code-points code-point
xe-1/0/2 :
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