WCCP return traffic - L2

[snarayanaraju]

Hello All - I am reading a WCCP implementation document. There it is mentioned under "Return Method" as below. But i dont understand why WCCP Client and Hosting systems should be on different VLAN?

Layer 2 (L2) –The destination MAC address is set to the MAC address of the WCCP server. In order to avoid re-intercepting L2 return traffic, the WCCP client should reside on a separate VLAN from host systems that it is servicing.

http://www.cisco.com/web/services/news/ts_newsletter/tech/chalktalk/archives/200806.html

regards,

SAIRAM

[ajay chauhan]

This is required to avoid loop if both are in same subnet traffic will be re intercepted and that causes loop. WAE should reside on a separate subnet to avoid infinite forwarding loop.

In using same VLAN GRE method should be used .

WAE(config)# egress-method negotiated-return intercept-method wccp

Hope this help.

Ajay