Cisco 10000 Series User Manual

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Cisco 10000 Series Router Quality of Service Configuration Guide
OL-7433-09
Chapter 17 Configuring Dynamic Subscriber Services
Dynamically Changing VC Weight and Watermark Values
For more information abut VC weight and watermarks, see Chapter 15, “Oversubscribing Physical and
Virtual Links.” The “How the Router Determines VC Weights” section on page 15-20 and the “High
Watermark and Low Watermark Default Values” section on page 15-25 describe VC weights and
watermarks.
To pull (download) dynamic VC weights and watermarks from a RADIUS server, you must enable
dynamic bandwidth selection (DBS) on the VC using the dbs enable command. To remove dynamically
modified VC parameters, enter the no dbs enable command. For more information, see the
“Configuring
Dynamic Bandwidth Selection” section on page 17-9.
After the router pulls VC weight and watermark parameters from the RADIUS server and successfully
installs or updates the parameters on the VC, any changes to these VC parameters that you configure
using the modular QoS command line interface (MQC) affect only the nvgen values and not the
RADIUS-pulled values.
The VC weight and watermark parameters pulled from the RADIUS server have precedence over the VC
parameters that you configure on the PVC using the MQC. As a result, the show atm vc detail command
displays the dynamically modified VC weight and watermark values pulled from RADIUS; it does not
display the nvgen values configured using CLI commands.
Feature History for Dynamic VC Weight and Watermarks
Configuration Commands for Dynamic VC Weight and Watermarks
The dbs enable command is used to configure dynamic VC weight and watermarks. For more
information, see the
“dbs enable Command” section on page 17-3.
The following RADIUS VSAs are used to configure dynamic VC weight and watermarks on the
RADIUS server:
cisco-avpair = “atm:vc-weight=<weight value>”
cisco-avpair = “atm:vc-watermark-min=<minimum watermark value>”
cisco-avpair = “atm:vc-watermark-max=<maximum watermark value>”
Note Valid VC weight values are from 1 to 255. However, we recommend that you do not configure the value
below 5.
For more information, see the “Setting Up RADIUS for Dynamic VC Weights and Watermarks” section
on page 17-22.
Cisco IOS Release Description Required PRE
Release 12.3(7)XI7 The DBS Extensions—VC Weight and Watermarks feature
was introduced on the PRE2.
PRE2
Release 12.2(28)SB This feature was integrated in Cisco IOS Release 12.2(28)SB. PRE2

Cisco 10000 Series Specifications

General

Brand	Cisco
Model	10000 Series
Category	Network Router
Language	English