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

84 7 - WCCP DEPLOYMENTS
Dual WCCP Deployment
The following section describes how to deploy two HP EFS WAN Accelerators that
are physically out-of-path but virtually in-path so that traffic is directed to them using
WCCP.
Figure 7-6. Dual WCCP Deployment
Traffic between client and server passes through the two routers. When each router is
configured with a WCCP service group, all traffic is redirected to pass through the
corresponding HP EFS WAN Accelerators as it transits the router, enabling the HP
EFS WAN Accelerators to optimize the connections. Auto-discovery functions
correctly—each HP EFS WAN Accelerator sends and receives traffic as if they were
using an in-path configuration.
IMPORTANT: The HP EFS WAN Accelerators are connected using the WAN interface only.
WCCP uses a router identification number (ID) to announce the router to the HP EFS
WAN Accelerators. The router ID is one of the interfaces IP addresses: the router ID
is not guaranteed to be the address of the interface closest to the HP EFS WAN
Accelerator.
The HP EFS WAN Accelerator must be able to route traffic back to the address that the
router uses as the router ID. It is not sufficient to have the HP EFS WAN Accelerator
know how to route to the client, server, and the server-side HP EFS WAN Accelerator;
the HP EFS WAN Accelerator must know how to route traffic to the interface that the
router takes its WCCP router ID from. The router ID can be changed by configuring a
loop-back interface (int loopback 0) with a more suitable IP address.
To configure router 1 • At the system prompt, enter the following set of commands on router 1:
ip wccp 90
!Wan Interface
interface Serial0
ip address 172.20.240.17 255.255.255.252
ip wccp 90 redirect in
!