Oversubscribing Atm Vbr-Nrt Vcs; Oversubscribing Frame Relay Pvcs - Cisco 10000 Series Configuration Manual

Chapter 15 Oversubscribing Physical and Virtual Links

Oversubscribing ATM VBR-nrt VCs

To enable oversubscription of ATM VBR-nrt VCs, enter the following commands beginning in global
configuration mode:
Command
Step 1
Router(config)# interface type
slot/subslot/port.subinterface
Step 2
Router(config-if)# atm over-subscription-factor
{factor}
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
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:
•
•
OL-7433-09
oversubscribes an ATM interface by five times the physical transmission capacity.
Oversubscribing Frame Relay PVCs Using Hierarchical Policies, page 15-12
Oversubscribing Frame Relay PVCs Using a Map Class, page 15-15
Purpose
Specifies the interface or subinterface on which you want to
enable VC oversubscription. Enters interface or
subinterface configuration mode.
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
Use this command for each ATM interface that you
Note
want to oversubscribe.
Cisco 10000 Series Router Quality of Service Configuration Guide
Configuring Oversubscription
15-11