Here are the commands that you would need.
Router(config)#interface Serial0
Router(config-if)#service-policy output cbwfq
Router(config)#class-map data
Router(config-cmap)#match access-group 1
Router(config)#policy-map cbwfq
Router(config-pmap)#class data
Router(config-pmap-c)#bandwidth 128
Router(config)#access-list 1 permit ip 10.70.60.11
Hope this helps,
Jason Smith
www.smif101.com