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Configuring Class of Service
with DiffServ
You configure class of service (CoS)
with Differentiated Services (DiffServ) when you need to override the default
packet forwarding behavior of a Services Router—especially in the three
areas identified in Table 121.
Table 121: Reasons to Configure
Class of Service (Cos) with DiffServ
|
Default Behavior to Override with CoS
|
CoS Configuration Area
|
|
Packet classification—By default,
the Services Router does not use DiffServ 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 the J-Web configuration editor or CLI configuration
editor to configure CoS with DiffServ. The J-Web interface does not include
Quick Configuration pages for CoS or DiffServ.
This chapter contains the following topics. For more information about
CoS and DiffServ, see the JUNOS Network Interfaces and Class of Service Configuration Guide.
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