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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 Services Router—especially in the three areas
identified in Table 170.
Table 170: Reasons
to Configure Class of Service (Cos)
|
Default Behavior to Override with
CoS
|
CoS Configuration Area
|
|
Packet classification—By
default, the Services Router does not use behavior aggregate (BA)
classifiers to classify packets. Packet classification applies to
incoming traffic.
|
Classifiers
|
|
Scheduling queues—By default,
the Services Router has only two queues enabled. Scheduling queues
apply to outgoing traffic.
|
Schedulers
|
|
Packet headers—By default, the Services Router 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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