43-6
Cisco Catalyst Blade Switch 3120 for HP Software Configuration Guide
OL-12247-01
Chapter 43 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.