I am working with a non-Cisco cache/proxy engine, trying to use WCCP v2 dynamic services to intercept HTTP, MMS, and RTSP requests in transparent cache mode, using the L2-Rewrite encapsulation that's described in the WCCP spec.
My test gear happens to be a 2600 router with IOS 12.1(3)T. All the documentation says that it handles L2 encapsulation, but the WCCP messages don't include the Capabilities Info and I can't tell whether the negotiation was successful.
I can provide as many gruesome details on the setup as you want, but I am trying to develop a general purpose product capability that will operate correctly in a wide range of customer environments. We do not want to use GRE tunneling, for performance and other reasons both in the router/switch and in the cache/proxy engine.
Is there a magic decoder ring? I can make my WCCP agent say anything I want, but the rest of the environment is a frustrating black box.
It is not an explicit statement either way. One of the key features of WCCP v2.0 is the L2-Rewrite option, and IOS 12.1 supports WCCP v2.0, and the 2600 series (and many other routers) support IOS 12.1. I can easily believe that some devices support L2-Rewrite and other don't, but it would make a developer's life much easier if the restrictions were more obvious.
Since posting the question, I have verified that the router is redirecting the traffic via a WCCP-GRE tunnel. Handling that will force us to modify the platform kernel - not our first choice, but doable.
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