Prerequisites For Wccp; Restrictions For Wccp - Cisco ASR 1000 Series Configuration Manual

Prerequisites for WCCP

Prerequisites for WCCP
• To use WCCP, IP must be configured on the interface connected to the Internet and another interface
• The interface connected to the content engine must be a Fast Ethernet or Gigabit Ethernet interface.
• Only Catalyst 6500 series switches with a PFC4 support the following hardware capabilities:

Restrictions for WCCP

General
The following limitations apply to WCCPv1 and WCCPv2:
• WCCP works only with IPv4 networks.
• WCCP bypasses Network Address Translation (NAT) when Cisco Express Forwarding is enabled.
WCCPv1
The following limitations apply to WCCPv1:
• WCCPv1 supports the redirection of HTTP (TCP port 80) traffic only.
• WCCPv1 does not allow multiple routers to be attached to a cluster of content engines.
WCCPv2
The following limitations apply to WCCPv2:
• WCCP works only with IPv4 networks.
• For routers servicing a multicast cluster, the Time To Live (TTL) value must be set at 15 or fewer.
• Service groups can comprise up to 32 content engines and 32 routers.
• All content engines in a cluster must be configured to communicate with all routers servicing the cluster.
• Multicast addresses must be from 224.0.0.0 to 239.255.255.255.
WCCP VRF Support
In Cisco IOS Release 12.2(33)SRE, this feature is supported only on Cisco 7200 NPE-G2 and Cisco
7304-NPE-G100 routers.
This feature is supported in Cisco IOS Release 12.2(50)SY on Catalyst 6000 series switches with a PFC4.
IP Application Services Configuration Guide, Cisco IOS XE Release 3S (Cisco ASR 1000)
50
must be connected to the content engine.
• WCCP generic routing encapsulation (GRE) decapsulation in hardware
• WCCP Egress Mask assignment in hardware
• WCCP Exclude capability in hardware
Configuring WCCP