Cisco 10000 Series User Manual

15-11
Cisco 10000 Series Router Quality of Service Configuration Guide
OL-7433-09
Chapter 15 Oversubscribing Physical and Virtual Links
Configuring Oversubscription
Oversubscribing ATM VBR-nrt VCs
To enable oversubscription of ATM VBR-nrt VCs, enter the following commands beginning in global
configuration mode:
Note You do not need to use the service-policy command to specify the ATM VC oversubscription because a
variable bit rate (VBR) ATM VC uses sustained cell rate (SCR) to define the VC’s average transmission
rate.
Example 15-2 oversubscribes an ATM interface by five times the physical transmission capacity.
Example 15-2 Oversubscribing an ATM VC
Router(config)# interface serial 1
Router(config-if)# atm over-subscription-factor 5
Oversubscribing Frame Relay PVCs
To oversubscribe Frame Relay PVCs, perform one of the following configuration tasks:
• Oversubscribing Frame Relay PVCs Using Hierarchical Policies, page 15-12
• Oversubscribing Frame Relay PVCs Using a Map Class, page 15-15
Command Purpose
Step 1
Router(config)# interface type
slot/subslot/port.subinterface
Specifies the interface or subinterface on which you want to
enable VC oversubscription. Enters interface or
subinterface configuration mode.
Step 2
Router(config-if)# atm over-subscription-factor
{factor}
Oversubscribes an ATM VC.
factor specifies the amount of oversubscription. The default
value is 1, which indicates no oversubscription. Valid values
are:
• 1 to 500 on the PRE2—Requires Cisco IOS Release
12.3(7)XI3 or later releases, or Cisco IOS
Release
12.2(28)SB
• 1 to 500 on the PRE3—Requires Cisco IOS
Release
12.2(31)SB2 or later releases
Note Use this command for each ATM interface that you
want to oversubscribe.

Cisco 10000 Series Specifications

General

Brand	Cisco
Model	10000 Series
Category	Network Router
Language	English