HP StorageWorks Enterprise File Services WAN Accelerator 3.0.4 deployment guide (AG421-96001, March 2007)

74 7 - WCCP DEPLOYMENTS
You can also provide failover support using WCCP. In a failover configuration, the HP
EFS WAN Accelerators periodically announce themselves to the routers. If an HP EFS
WAN Accelerator fails, traffic is redirected to the working HP EFS WAN Accelerators.
To configure failover support where the passive HP EFS WAN Accelerator takes over
if there is a failure in the active HP EFS WAN Accelerator, you simply configure the
weight for the backup HP EFS WAN Accelerator to be 0. For detailed information, see
“Failover Support” on page 88.
Basic Steps The following steps summarize how to configure WCCP on a client-side HP EFS
WAN Accelerator with an out-of-path server-side HP EFS WAN Accelerator.
IMPORTANT: This is an example of one type of WCCP deployment. You can also have
deployments with both HP EFS WAN Accelerators configured as in-path devices and WCCP
configured on one of them. Contact HP Technical Support for further information at http://
www.hp.com.
1. Create a service group on the router and set the router to redirect traffic to the HP
EFS WAN Accelerator using WCCP on the interfaces where traffic goes.
2. Attach the WAN interface of the HP EFS WAN Accelerator to the network. The
WAN interface must be able to communicate with the switch or router where
WCCP is configured and where WCCP redirection will take place.
3. Configure the HP EFS WAN Accelerator to be an in-path device with WCCP
support on the client-side. For example, in-path oop enable.
4. Add fixed-target, in-path rules to reach the server-side HP EFS WAN Accelerator.
5. Add the service group on the HP EFS WAN Accelerator.
6. Enable WCCP on the HP EFS WAN Accelerator.
WCCP CLI
Commands
This section summarizes the WCCP commands. For detailed information, see the HP
StorageWorks Enterprise File Services WAN Accelerator Command-Line Interface
Reference Manual.
 To enable client-side WCCP:
SH (config) # wccp enable

To disable client-side WCCP:
SH (config) # no wccp enable

To specify the multicast Time To Live (ttl) value for WCCP:
SH (config) # wccp mcast-ttl 10

To configure a service group:
SH (config) # wccp service-group <service ID> routers <IP address>
[flags ] [priority ] [ports ] [password ] [weight ] [encap_scheme ]