Cisco IOS Cookbook, 2nd Edition

Using RSVP

Problem

You want to configure RSVP on your network.

Solution

Basic RSVP configuration is relatively simple. All you need to do is define how much bandwidth can be reserved on the interface:

Router#configure terminal
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#interface FastEthernet0/0
Router(config-if)#ip rsvp bandwidth 128 56
Router(config-if)#exit
Router(config)#end
Router#

Some network administrators have to worry about unauthorized use of bandwidth reservation. You can control this by specifying an access-list of allowed neighbor devices:

Router#configure terminal
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#access-list 15 permit ip 192.168.1.0 0.0.0.255
Router(config)#interface FastEthernet0/0
Router(config-if)#ip rsvp bandwidth 128 56
Router(config-if)#ip rsvp neighbor 15
Router(config-if)#exit
Router(config)#end
Router#

Discussion

Note that before you can configure RSVP on an interface, you must first configure the interface for WFQ, CBWFQ, or WRED. This step is not included in this example, to make it easier to focus on the RSVP configuration. For examples of WFQ, CBWFQ, and WRED, please refer to Recipes 11.6, 11.7, and 11.9, respectively.

The first example tells the router to pay attention to RSVP signaling, and defines how much bandwidth can be reserved in the following command:

Router(config-if)#ip rsvp bandwidth 128 56

The first numerical argument, 128, specifies that applications can reserve a maximum aggregate ...