Cisco Systems 3560 Manual De Usuario
43-5
Catalyst 3560 Switch Software Configuration Guide
OL-8553-06
Chapter 43 Configuring Web Cache Services By Using WCCP
Configuring WCCP
Configuring WCCP
These sections describe how to configure WCCP on your switch:
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•
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(required)
Default WCCP Configuration
shows the default WCCP configuration.
WCCP Configuration Guidelines
Before configuring WCCP on your switch, make sure to follow these configuration guidelines:
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The application engines and switches in the same service group must be in the same subnetwork
directly connected to the switch that has WCCP enabled.
directly connected to the switch that has WCCP enabled.
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Configure the switch interfaces that are connected to the web clients, the application engines, and
the web server as Layer 3 interfaces (routed ports and switch virtual interfaces [SVIs]). For WCCP
packet redirection to work, the servers, application engines, and clients must be on different subnets.
the web server as Layer 3 interfaces (routed ports and switch virtual interfaces [SVIs]). For WCCP
packet redirection to work, the servers, application engines, and clients must be on different subnets.
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Use only nonreserved multicast addresses when configuring a single multicast address for each
application engine.
application engine.
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WCCP entries and PBR entries use the same TCAM region. WCCP is supported only on the
templates that support PBR: access, routing, and dual IPv4/v6 routing.
templates that support PBR: access, routing, and dual IPv4/v6 routing.
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When TCAM entries are not available to add WCCP entries, packets are not redirected and are
forwarded by using the standard routing tables.
forwarded by using the standard routing tables.
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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.
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.
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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.
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.
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You cannot configure WCCP and VPN routing/forwarding (VRF) on the same switch interface.
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You cannot configure WCCP and PBR on the same switch interface.
Table 43-1
Default WCCP Configuration
Feature
Default Setting
WCCP enable state
WCCP services are disabled.
Protocol version
WCCPv2.
Redirecting traffic received on an interface
Disabled.