Cisco IOS Cookbook, 2nd Edition

Using Frame-Relay Traffic Shaping

Problem

You want to separately control the amount of traffic sent along each of the PVCs in a Frame Relay network.

Solution

This first example shows how to configure frame relay traffic shaping by using point-to-point frame relay subinterfaces:

Router#configure terminal
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#interface HSSI0/0
Router(config-if)#encapsulation frame-relay
Router(config-if)#exit
Router(config)#interface HSSI0/0.1 point-to-point
Router(config-subif)#traffic-shape rate 150000
Router(config-subif)#frame-relay interface-dlci 31
Router(config-subif)#exit
Router(config)#end
Router#

Most Frame Relay carrier networks are sufficiently over-provisioned that you can actually use much more capacity than your contractual Committed Information Rate (CIR). So you might want to apply traffic shaping only when you encounter Frame-Relay congestion problems, and then only to reduce the data rate until the congestion goes away:

Router#configure terminal
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#interface HSSI0/0
Router(config-if)#encapsulation frame-relay
Router(config-if)#exit
Router(config)#interface HSSI0/0.1 point-to-point
Router(config-subif)#traffic-shape adaptive 10000
Router(config-subif)#frame-relay interface-dlci 31
Router(config-subif)#exit
Router(config)#end
Router#

Discussion

These examples are different from the one that we showed in Recipe 11.13. In this recipe, we don’t want ...