WCCP protocol can be much more interesting than the two commands needed for the CCIE exam. In this lab we will deploy a basic end-to-end solution using IOS 15.2S and the well known open-source solution Squid v3.1 as the content engine.
WCCP version2 is deployed in the lab.
1-Topology
WCCP enables the router to transparently intercept client traffic destined to Internet and redirect it to a local content engine. Client browsers doesn’t point to the content engine as proxy.
Cisco and the content engine communicate through unidirectional point-to-point tunnels (either layer2 or GRE ).
2-WCCPv2 Interception
The tunnel interfaces are automatically created in order to process outgoing GRE-encapsulated traffic for WCCP.
Short definitions of some related concepts:
| Forward proxy | Filter access to Internet and reduces BW related to Internet static resources like regular updates, big file downloads… |
| Reverse proxy | Allows external users (ex: on Internet) to access internal servers. Generally supports… |
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