Specifications

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Cisco Wide Area Application Services Command Reference

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Chapter 3 CLI Commands

(config) wccp version

To specify the version of WCCP that the WAE should use, enter the wccp version global configuration

command. To disable the currently running version, use the no form of the command.

wccp version 2

Syntax Description This command has no arguments or keywords.

Defaults No default behavior or values

Command Modes global configuration

Device Modes application-accelerator

Usage Guidelines You must configure a WAE to use WCCP Version 2 instead of WCCP Version 1 because WCCP

Ver si on

1 only supports web traffic (port 80).

The WAE performs a clean shutdown after a reload or no wccp version 2 command is entered. A clean

shutdown prevents broken TCP connections.

The following sequence of events details the interaction between WAEs and routers that have been

configured to run WCCP Version

1. Each WAE is configured with a router list. (See the “(config) wccp router-list” command.)

2. Each WAE announces its presence and a list of all routers with which it has established

communications. The routers reply with their view (list) of WAEs in the group.

Routers and WAEs become aware of one another and form a WCCP service group using a

management protocol. The WAEs also send periodic “Here I am” messages to the routers that allow

the routers to rediscover the WAEs. To properly depict the view, the protocol needs to include the

list of routers in the service group as part of its messages.

3. Once the view is consistent across all the WAEs in the WAE cluster, one WAE is designated the lead.

When there is a group of WAEs, the one seen by all routers and the one that has the lowest IP

address

becomes the lead WAE.

The role of this lead WAE is to determine how traffic should be allocated across the WAEs in the

WAE group. The lead WAE sets the policy that the WCCP-enabled routers must adhere to when

redirecting packets to the WAEs in this cluster. The assignment information is passed to the entire

service group from the designated WAE so that the routers in the service group can redirect the

packets properly and the WAEs in the service group can better manage their load.

Note WCCP works only with IPv4 networks.