Troubleshooting guide

1-7
Cisco Wide Area Application Services Configuration Guide
OL-26579-01
Chapter 1 Configuring Traffic Interception
Configuring Advanced WCCP Features on Routers
Figure 1-1 Service Groups with WCCP Version 2
If you have a group of branch WAEs, the WAE that is seen by all the WCCP Version 2-enabled routers
and that has the lowest IP address becomes the lead branch WAE.
The following procedure describes how a branch WAE in a service group is designated as the lead:
1. Each branch WAE is configured with a list of WCCP-enabled routers.
Multiple WCCP-enabled routers can service a group (up to 32 routers can be specified). Any of the
available routers in a service group can redirect packets to each of the branch WAEs in the group.
2. Each branch WAE announces its presence to each router on the router list. The routers reply with
their view of branch WAEs in the service group.
3. After the view is consistent across all of the branch WAEs in the group, one branch WAE is
designated as the lead branch WAE and sets the policy that the WCCP-enabled routers need to
deploy in redirecting packets.
The lead branch WAE determines how traffic should be allocated across the branch WAEs in the group.
The assignment information is passed to the entire service group from the designated lead branch WAE
so that the WCCP-enabled routers of the group can redirect the packets and the branch WAEs in the
group can better manage their load.
WCCP uses service groups to define WAAS services for a WCCP Version 2-enabled router and
branch WAEs in a group. WCCP also redirects client requests to these groups in real time.
1 Clients requesting file services 3 Branch WAEs
2 Cisco routers 4 WA E servi c e g r oup
159091
Internet
1 2 3
4