Feature History For Per-Session Shaping For Atm Interfaces; Restrictions And Limitations For Per-Session Shaping For Atm Interfaces; Configuring Per-Session Shaping For Atm Interfaces - Cisco 10000 Series Configuration Manual
Quality of service configuration guide
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Per-Session Shaping for ATM Interfaces
Feature History for Per-Session Shaping for ATM Interfaces
Cisco IOS Release
Release 12.2(33)SB
Restrictions and Limitations for Per-Session Shaping for ATM Interfaces
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Configuring Per-Session Shaping for ATM Interfaces
To configure per-session shaping for ATM interfaces, enter the following commands beginning in global
configuration mode:
Command
Step 1
Router(config)# policy-map policy-map-name
Step 2
Router(config-pmap)# class class-map-name
Step 3
Router(config-pmap-c)# bandwidth
{bandwidth-kbps | percent percentage |
remaining percent percentage}
Cisco 10000 Series Router Quality of Service Configuration Guide
18-46
Description
The Per-Session Shaping for ATM Interfaces feature was
introduced on Cisco 10000 series router and implemented
on the PRE3 and PRE4.
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.
Chapter 18
Regulating and Shaping Subscriber Traffic
Purpose
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.
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.
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.
Required PRE
PRE3
PRE4
OL-7433-09
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