HP StorageWorks Enterprise File Services WAN Accelerator Deployment Guide (November 2005)

HP EFS WAN ACCELERATOR DEPLOYMENT GUIDE 73
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 logically in-path so that traffic is directed to
them using WCCP.
Figure 7-8. 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.
The 6509 router uses hardware switching, if it can. It must be turned off using
the no mls ip command on the interfaces which are enabled for WCCP.
To configure the
WCCP (3640) router
• At the system prompt, enter the following set of commands on the CISCO
3640 router: