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Configuring Class of Service
You configure class of service
(CoS) when you need to override the default packet forwarding behavior
of a J–series or SRX-series device—especially in the three
areas identified in Table 183.
Table 183: Reasons
to Configure Class of Service (Cos)
|
Default Behavior to Override with
CoS
|
CoS Configuration Area
|
|
Packet classification—By
default, the J–series or SRX-series device does not use behavior
aggregate (BA) classifiers to classify packets. Packet classification
applies to incoming traffic.
|
Classifiers
|
|
Scheduling queues—By default,
the J–series or SRX-series device has only two queues enabled.
Scheduling queues apply to outgoing traffic.
|
Schedulers
|
|
Packet headers—By default, the J–series
or SRX-series device does not rewrite CoS bits in packet headers.
Rewriting packet headers applies to outgoing traffic.
|
Rewrite rules
|
You can use either J-Web Quick Configuration or
a configuration editor to configure CoS. This chapter contains the
following topics. For more information about CoS, see the JUNOS Class of Service Configuration Guide.
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