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8-17
Cisco 10000 Series Router Software Configuration Guide
OL-2226-23
Chapter 8 Configuring ATM Permanent Virtual Circuit Autoprovisioning
Variable Bit Rate Non-Real Time Oversubscription
Configuration Tasks for VBR-nrt Oversubscription
To configure the VBR-nrt Oversubscription feature, perform the following configuration tasks:
• Configuring VBR-nrt Oversubscription, page 8-17
• Verifying ATM PVC Oversubscription, page 8-17
Configuring VBR-nrt Oversubscription
To enable oversubscription of ATM VCs, enter the following command in interface 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 average transmission
rate.
Example 8-11 oversubscribes an ATM interface by five times the physical transmission capacity.
Example 8-11 Oversubscribing an ATM VC
Router(config)# interface atm 4/0/0
Router(config-if)# atm over-subscription-factor 5
Verifying ATM PVC Oversubscription
To verify the configuration of ATM PVC oversubscription, enter any of the following commands in
privileged EXEC mode:
Command Purpose
Router(config-if)# atm over-subscription-factor
{1-500}
Oversubscribes an ATM VC.
1-500 specifies the amount of oversubscription. The default
value is 1.
Note Use this command for each ATM interface that you
want to oversubscribe.
Command Purpose
Router# show controllers interface
Displays the total subscribed rate of all VCs on the port.
The system allows VCs to be added provided the total subscribed
rate is less than or equal to:
port speed * over-subscription-factor.
Router# show running-config
Displays the contents of the currently running configuration file.
Indicates that oversubscription is on.