Registering A Router To A Multicast Address; Using Access Lists For A Wccp Service Group - Cisco 6500 Series Software Configuration Manual

Configuring WCCP

Registering a Router to a Multicast Address

If you decide to use the multicast address option for your service group, you must configure the router
to listen for the multicast broadcasts on an interface. To configure the router, perform this task:
Command
Step 1
Router(config)# ip wccp {web-cache |
service-number} group-address groupaddress
Step 2
Router(config)# interface type number
Step 3
Router(config-if)# ip wccp {web-cache |
service-number} group-listen
For network configurations where redirected traffic needs to traverse an intervening router, the router
being traversed must be configured to perform IP multicast routing. You must configure the following
two components to enable traversal over an intervening router:
•
•

Using Access Lists for a WCCP Service Group

To configure the router to use an access list to determine which traffic should be directed to which cache
engines, perform this task in global configuration mode:
Command
Step 1
Router(config)# access-list access-list permit ip
host host-address [destination-address |
destination-host | any]
Step 2
Router(config)# ip wccp web-cache group-list
access-list
To disable caching for certain clients, perform this task in global configuration mode:
Command
Step 1
Router(config)# access-list access-list permit ip
host host-address [destination-address |
destination-host | any]
Step 2
Router(config)# ip wccp web-cache redirect-list
access-list
Catalyst 6500 Series Switch Cisco IOS Software Configuration Guide—Release 12.1 E
35-10
Enable IP multicast routing using the ip multicast routing interface configuration command.
Enable the interfaces to which the cache engines will connect to receive multicast transmissions
using the ip wccp group-listen interface configuration command (note that earlier Cisco IOS
versions required the use of the ip pim interface configuration command).
Chapter 35 Configuring Web Cache Services Using WCCP
Purpose
Specifies the multicast address for the service group.
Specifies the interface to be configured for multicast
reception.
Enables the reception of IP multicast packets (content
originating from the cache engines) on the interface
specified in Step 2.
Purpose
Creates an access list that enables or disables traffic
redirection to the cache engine.
Indicates to the router from which IP addresses of cache
engines to accept packets.
Purpose
Creates an access list that enables or disables traffic
redirection to the cache engine.
Sets the access list used to enable redirection.
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