[c-nsp] WCCP & Squid

[Reuben Farrelly]

Hi,

At 10:16 p.m. 9/09/2004, Stavros Patiniotis wrote:
> > I am testing a WCCP implementation on a Cisco router with
> > Squid-2.5.STABLE-5.
> > I am able to get the router to send and receive WCCP messages
> > to the Squid
> > process, which successfully establishes the WCCP connection
> > on the right
> > interface.
> >
> > When I try using route-maps to redirect all HTTP traffic from
> > the router to
> > Squid, it works fine, and Squid is able to respond to users'
> > web requests.
> > But when I switch back to WCCP, no action.
>
>Many operating systems require patches or special configuration to use squid
>with wccp.
>
>I think that you should look at the squid FAQ :
>http://www.squid-cache.org/Doc/FAQ/FAQ-17.html
>
>Also I would bet that the problem is not with your router, so you would more
>than likely get better suggestions from the squid mailing list.

While building the ip_wccp module can be less than trivial for the 
uninitiated, various versions of IOS have been broken, then fixed, then 
broken, especially in the 12.3 T train.  Which is unfortunate because it 
makes what ought to be a fairly trivial setup process, sometimes an 
exercise in patience and perseverance.

For example, I've found 12.3(8)T to be completely broken with WCCP, (the 
more recent 12.3(8)YA is broken too) 12.3(7)T worked ok, 12.3(4)T was 
broken (from memory) and some previous versions required the WCCP 
redirection on the outbound rather than inbound until this was fixed for 
12.3(7)T.  Other times required CEF and/or ip route-cache to be turned 
off.  Some  other versions also forgot to _not_ redirect the cache itself 
from redirection.  That means that WCCP is definitely something that you 
must test out as part of your pre-upgrade IOS preparation.

The bug toolkit on CCO suggests cisco aren't aware of the recent WCCP 
breakage and I can't open a case as none of our corporate customers use 
WCCP, and where I work we are a cisco partner so opening TAC cases counts 
against our statistics.....

I suspect that very few people who use WCCP live on the bleeding edge as 
breakage on that front is a bit too common for my liking :(

I do really like WCCP, even version 1 with 1 cache and 1 router is a really 
cool thing :)

Reuben