HP StorageWorks Enterprise File Services WAN Accelerator 2.1.5 deployment guide (June 2006)

76 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 7-8. 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:
version 12.3
service timestamps debug datetime localtime show-timezone