Troubleshooting guide

1-11
Cisco Wide Area Application Services Configuration Guide
OL-26579-01
Chapter 1 Configuring Traffic Interception
Configuring WCCP on WAEs
The following example configures the loopback interface, exits configuration mode, and saves the
running configuration to the startup configuration:
Router(config)# interface Loopback0
Router(config-if)# ip address 111.111.111.111 255.255.255.0
Router(config-if)# no shutdown
Router(config-if)# end
Router# copy running-config startup-config
Configuring Router QoS for WCCP Control Packets
WAAS sends WCCP control packets marked with a differentiated services code point (DSCP) value of
192. (In WAAS versions earlier than 4.2, packets were unmarked.) For a router to honor this priority
value, you must configure the router’s multilayer switching (MLS) quality of service (QoS) port trust
state and classify traffic by examining the DSCP value. To configure the router appropriately, use the
mls qos trust dscp command in interface configuration mode on the interface connected to the WAE.
Configuring WCCP on WAEs
This section contains the following topics:
• Information About Load Balancing and WAEs, page 1-11
• Information About Packet-Forwarding Methods, page 1-14
• Information About WCCP Flow Redirection on WAEs, page 1-16
• Configuring or Viewing the WCCP Settings on WAEs, page 1-17
• Configuring or Viewing the WCCP Settings on ANCs, page 1-22
• Configuring and Viewing WCCP Router Lists for WAEs, page 1-26
• Configuring WAEs for a Graceful Shutdown of WCCP, page 1-26
• Configuring Static Bypass Lists for WAEs, page 1-27
• Configuring Interception Access Control Lists, page 1-28
• Configuring Egress Methods for WCCP Intercepted Connections, page 1-29
Note Before you do the procedures in this section, you should have completed an initial configuration of your
WAAS network, which includes the basic configuration of WCCP Version 2 and the TCP promiscuous
mode service on your routers and WAEs, as described in the Cisco Wide Area Application Services Quick
Configuration Guide.
Information About Load Balancing and WAEs
Multiple WAEs with WCCP support can be deployed for dynamic load balancing to enable adjustments
to the loads being forwarded to the individual WAEs in a service group. IP packets received by a
WCCP-enabled router are examined to determine if it is a request that should be directed to a WAE.
Packet examination involves matching the request to a defined service criteria. These packets are passed
to the processing routine on the router to determine which WAE, if any, should receive the redirected
packets.