Configuring Cos Drop Profile (Nsm Procedure) - Juniper NETWORK AND SECURITY MANAGER - NSM CONFIGURATION GUIDE FOR EX SERIES DEVICES REV 3 Configuration Manual

Configuring CoS Drop Profile (NSM Procedure)

Table 16: Drop Profile Configuration Fields
Option
Drop Profile
Copyright © 2010, Juniper Networks, Inc.
Drop profiles provide a congestion management mechanism that enables a switch or
routing platform to drop the arriving packets when queue buffers become full or begin
to overflow. Drop profiles define the meanings of loss priorities. When you configure drop
profiles you are essentially setting the value for queue fullness. The queue fullness
represents the percentage of the memory used to store packets in relation to the total
amount of memory that has been allocated for that specific queue. The queue fullness
defines the delay-buffer bandwidth, which provides packet buffer space to absorb burst
traffic up to the specified duration of delay. Once the specified delay buffer becomes
full, packets with 100 percent drop probability are dropped from the tail of the buffer.
You specify drop probabilities in the drop profile section of the CoS configuration hierarchy
and reference them in each scheduler configuration. By default, if you do not configure
any drop profile then the drop profile that is in effect functions as the primary mechanism
for managing congestion. In the default tail drop profile, when the fill level is 0 percent,
the drop probability is 0 percent. When the fill level is 100 percent, the drop probability
is 100 percent.
To configure drop profiles in NSM:
In the navigation tree, select Device Manager > Devices.
1.
Click the Device Tree tab, and then double-click the device for which you want to
2.
configure drop profiles.
Click the Configuration tab. In the configuration tree expand Class of Service.
3.
Select Drop Profiles.
4.
Add or modify the drop profiles as specified in Table 16 on page 19.
5.
Click one:
6.
OK—Saves the changes.
Cancel—Cancels the modifications.
NOTE: After you make changes to a device configuration, you must push that
updated device configuration to the physical security device for those changes
to take effect. You can update multiple devices at one time. See Updating
Devices section in the Network and Security Manager Administration Guide for
more information.
Function
Chapter 3: Configuring Class of Service
Your Action
19