Cisco Systems 3750E manual Enabling the Web Cache Service, 41-6

Chapter 41 Configuring Web Cache Services By Using WCCP

Configuring WCCP

•The number of available policy-based routing (PBR) labels are reduced as more interfaces are enabled for WCCP ingress redirection. For every interface that supports service groups, one label is consumed. The WCCP labels are taken from the PBR labels. You need to monitor and manage the labels that are available between PBR and WCCP. When labels are not available, the switch cannot add service groups. However, if another interface has the same sequence of service groups, a new label is not needed, and the group can be added to the interface.

•The routing maximum transmission unit (MTU) size configured on the stack member switches should be larger than the client MTU size. The MAC-layer MTU size configured on ports connected to application engines should take into account the GRE tunnel header bytes.

•You cannot configure WCCP and VPN routing/forwarding (VRF) on the same switch interface.

•You cannot configure WCCP and PBR on the same switch interface.

•You cannot configure WCCP and a private VLAN (PVLAN) on the same switch interface.

Enabling the Web Cache Service

For WCCP packet redirection to operate, you must configure the switch interface connected to the client to redirect inbound packets.

This procedure shows how to configure these features on routed ports. To configure these features on SVIs, see the configuration examples that follow the procedure.

Beginning in privileged EXEC mode, follow these steps to enable the web cache service, to set a multicast group address or group list, to configure routed interfaces, to redirect inbound packets received from a client to the application engine, enable an interface to listen for a multicast address, and to set a password. This procedure is required.

Note Before configuring WCCP commands, configure the SDM template, and reboot the switch. For more information, see Chapter 8, “Configuring SDM Templates.”

Catalyst 3750-E and 3560-E Switch Software Configuration Guide

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