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Configuring CoS Forwarding Policy (NSM Procedure)
Copyright © 2010, Juniper Networks, Inc.
Class-of-service (CoS)-based forwarding (CBF) enables you to control next-hop selection
based on a packet's class of service and, in particular, the value of the IP packet's
precedence bits.
You can specify a particular interface or next hop to carry high-priority traffic while all
best-effort traffic takes some other path. When a routing protocol discovers equal-cost
paths, it can pick a path at random or load-balance across the paths through either hash
selection or round robin. CBF allows path selection based on class.
To configure CoS forwarding policy in NSM:
In the NSM navigation tree, select Device Manager > Devices.
1.
Click the Device Tree tab, and then double-click the device to select it.
2.
Click the Configuration tab. In the configuration tree, expand Class of Service.
3.
Select Forwarding Policy.
4.
Add or modify forwarding policy settings as specified in Table 62 on page 131.
5.
Click one:
6.
OK—Saves the changes.
Cancel—Cancels the modifications.
Table 62: Forwarding Policy Configuration Details
Task
Specify the name of
forwarding class and
override the incoming
packet classification.
Chapter 13: Configuring Class of Service Features
Your Action
1.
Click Add new entry next to Class.
2. In the Name box, enter the name of forwarding class.
3. Click Classification Override next to Class.
4. In the Forwarding Class box, enter the name of the forwarding
class.
131
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