Cisco 10000 Series User Manual

18-46
Cisco 10000 Series Router Quality of Service Configuration Guide
OL-7433-09
Chapter 18 Regulating and Shaping Subscriber Traffic
Per-Session Shaping for ATM Interfaces
Feature History for Per-Session Shaping for ATM Interfaces
Restrictions and Limitations for Per-Session Shaping for ATM Interfaces
• If you configure child classes with a guaranteed bandwidth, do not oversubscribe the sessions. If you
do oversubscribe the sessions and the hierarchical policy shapes session traffic, any bandwidth
guarantees configured for the child policies might not be guaranteed. Oversubscription occurs when
the aggregate configured shape rate for all active sessions exceeds the bandwidth of the physical link
through which the session traffic passes when leaving the router.
• Per-session shaping for ATM interfaces does not support load-balancing on an L2TP tunnel (for
example, on the LNS). Therefore, if you enable per-session shaping in a service policy, do not
configure load-balancing on the tunnel.
• This feature does not support overhead accounting.
Configuring Per-Session Shaping for ATM Interfaces
To configure per-session shaping for ATM interfaces, enter the following commands beginning in global
configuration mode:
Cisco IOS Release Description Required PRE
Release 12.2(33)SB The Per-Session Shaping for ATM Interfaces feature was
introduced on Cisco 10000 series router and implemented
on the PRE3 and PRE4.
PRE3
PRE4
Command Purpose
Step 1
Router(config)# policy-map policy-map-name
Creates or modifies a child policy. Enters policy-map
configuration mode.
policy-map-name is the name of the child policy map. The
name can be a maximum of 40 alphanumeric characters.
Step 2
Router(config-pmap)# class class-map-name
Assigns the traffic class you specify to the policy map.
Enters policy-map class configuration mode.
class-map-name is the name of a previously configured
class map.
Step 3
Router(config-pmap-c)# bandwidth
{bandwidth-kbps | percent percentage |
remaining percent percentage}
Enables class-based fair queuing and overhead accounting.
bandwidth-kbps specifies or modifies the minimum
bandwidth allocated for a class belonging to a policy map.
Valid values are from 8 to 2,488,320, which represents from
1
to 99 percent of the link bandwidth.
percentage specifies or modifies the maximum percentage
of the link bandwidth allocated for a class belonging to a
policy map. Valid values are from 1 to 99.
remaining percentage specifies or modifies the minimum
percentage of unused link bandwidth allocated for a class
belonging to a policy map. Valid values are from 1 to 99.

Cisco 10000 Series Specifications

General

Brand	Cisco
Model	10000 Series
Category	Network Router
Language	English