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WCCP
FeIix edited this page May 1, 2026
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The Web Cache Communication Protocol (WCCP) is a Cisco-developed content-routing technology that intercepts IP packets and redirects those packets to a destination other than that specified in the IP packet.
- UDP port 2048
- Redirecting or returning traffic via GRE (client to be multiple hops away from server) or L2 Forwarding (client and server on the same subnet)
| Device | Function | |
|---|---|---|
| WCCP Client | Content Engine/Proxy | A device, such as a Secure Web Appliance (SWA) that receives redirected traffic to either fulfill the request from its local cache or process it further. |
| WCCP Server | Router/Switch | A WCCP-enabled router or L3 switch that intercepts and redirects traffic based on specified service groups. |
| Service Group | Configuration | A logical grouping of WCCP servers and clients that share the same configuration settings for traffic redirection. |
| Type | Function | What it controls | Example Devices/Apps | |
|---|---|---|---|---|
group-list |
ACL | Clients Filter | Defines which Cache Engines (clients) are allowed to join the service group. | SWA with IP 10.0.0.10 |
redirect-list |
ACL | Traffic Selection | An ACL that identifies specific user traffic (e.g., HTTP/HTTPS) to be redirected. | HTTP (Port 80), HTTPS (Port 443) |
ip wccp web-cache|<NUMBER>
|
Identifier | Service Group Defination |
web-cache is system pre-defined (service 0) whiled <NUMBER> is custom dynamic-defined (service 51-255). |
ip wccp we-cache, ip wccp 80 group-list SWA redirect-list 10
|