Using RSVP
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 [...]