Troubleshooting guide

CHAPTER

1-1

Cisco Wide Area Application Services Configuration Guide

OL-26579-01

Configuring Traffic Interception

This chapter describes how to configure interception of TCP traffic in an IP-based network, based on the

IP and TCP header information and how to redirect the traffic to WAAS devices. This chapter describes

the use of the Web Cache Communication Protocol (WCCP), policy-based routing (PBR), inline mode

for transparent redirection of traffic to WAEs, appnav-controller mode for use with an AppNav

Controller, and VPATH interception for redirection of VMware packets to virtual WAAS (vWAAS).

Note Throughout this chapter, the term WAAS device is used to refer collectively to the WAAS Central

Managers and WAEs in your network. The term WAE refers to WAE and WAVE appliances, WAE

Network Modules (the NME-WAE family of devices), SM-SRE modules running WAAS, and vWAAS

instances.

Before you do the procedures in this chapter, you should complete a basic initial installation and

configuration of your WAAS network as described in the Cisco Wide Area Application Services Quick

Configuration Guide. For detailed command syntax information for any of the CLI commands in this

chapter, see the Cisco Wide Area Application Services Command Reference. For more information about

WCCP see the CISCO IOS documentation.

This chapter contains the following sections:

• Information About Interception Methods, page 1-1

• Information About WCCP Interception, page 1-3

• Configuring Advanced WCCP Features on Routers, page 1-6

• Configuring WCCP on WAEs, page 1-11

• Using Policy-Based Routing Interception, page 1-33

• Using Inline Mode Interception, page 1-42

• Configuring VPATH Interception on a vWAAS Device, page 1-55

• Configuring AppNav Interception, page 1-56

Information About Interception Methods

In a WAAS network, traffic between clients in the branch offices and the servers in the data center can

be redirected to WAEs for optimization, redundancy elimination, and compression. Traffic is

transparently intercepted and redirected to WAEs based on policies that have been configured on the

routers or on an AppNav Controller (ANC). The network elements that transparently redirect requests