Re: [squid-users] How does WCCP work ?

    I have a working setup now. In a couple of days i'll send a modified
version of ip_wccp.c for 2.4.x

    Regards.

    -Jorge

==============================================================
Jorge Boncompte - Técnico de sistemas
DTI2 - Desarrollo de la Tecnología de las Comunicaciones
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C/ Abogado Enriquez Barrios, 5 14004 CORDOBA (SPAIN)
Tlf: +34 957 761395 / FAX: +34 957 450380
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jorge@dti2.net _-_-_-_-_-_-_-_-_-_-_-_-_-_ http://www.dti2.net
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----- Original Message -----
From: "Binaya" <binaya@mos.com.np>
To: "Joe Cooper" <joe@swelltech.com>
Cc: "Awie" <awie@eksadata.com>; <squid-users@squid-cache.org>
Sent: Tuesday, March 20, 2001 8:26 AM
Subject: Re: [squid-users] How does WCCP work ?

> Hi
> I configured a Linux server for WCCP.. The router finds the proxy server
> automatically.. and also redirects some of the packets. But the browsing
> is too slow; so slow that it is better not to have WCCP enable.
>
> May I know where sth went wrong ?
>
>
>
> On Sat, 17 Mar 2001, Joe Cooper wrote:
>
> > Ok...Let's see if the problem can be isolated:
> >
> > What is your IOS version?
> >
> > If a version that supports both v1 and v2 of WCCP, have you switched it
> > to v1?
> >
> > I know that you are able to load the ip_wccp module, because we've
> > already discussed that. Have you set up a network dump, using a tool
> > such as tcpdump or ethereal, between the router and the Squid box to see
> > if the Squid is actually sending out HERE_I_AM messages?
> >
> > To answer your questions:
> >
> > For a complete description of the protocol, here is the specification
> > for v1:
> >
> > http://www.wrec.org/Drafts/draft-ietf-wrec-web-pro-00.txt
> >
> > Short version:
> >
> > The protocol is pretty simple. Squid sends a packet to the router:
> > "HERE_I_AM" on the WCCP port (2048), which contains the IP of the
> > sending cache. The router sends a packet back, with an ID: "I_SEE_YOU".
> > When the cache replies: "HERE_I_AM" again, it confirms two way
> > connectivity by including the ID from the previous "I_SEE_YOU".
> >
> > There is no "WCCP channel", just port 2048, but those packets are not
> > encapsulated. So, even without the ip_wccp module loaded, I think you
> > will still be able to 'connect' the cache and the router, and see
> > HERE_I_AM and I_SEE_YOU packets going back and forth. Redirected
> > requests, however, will not work until one of the GRE modules is loaded.
> >
> > If you are not seeing this communication, then either your Squid is
> > sending the WCCP messages, the messages are not reaching the router, or
> > the router is ignoring them. You need to do some form of packet dump to
> > see if those messages are coming and going at all.
> >
> > Awie wrote:
> >
> > > Folks,
> > >
> > > I am beginning frustrated because not able to make WCCP running at our
> > > Squid system.
> > >
> > > My Squid is known by Cisco as CacheEngine. But redirection progress
was
> > > not happen. I did not see "Here_I_AM / I_See_You" signal in my router
> > > although I am in debug and terminal mode.
> > >
> > > I followed all of FAQ instruction and suggestion from some of you
> > > (thanks for Joe Cooper, Jan Haluza, etc), PLUS Cisco staff. However,
my
> > > WCCP is still not running.
> > >
> > > Hope someone would explain me how actually Squid communicate with
router
> > > through WCCP channel.
> > >
> > > Please advise.
> > >
> > > Thx & rgds,
> > >
> > > Awie
> >
> > --
> > Joe Cooper <joe@swelltech.com>
> > Affordable Web Caching Proxy Appliances
> > http://www.swelltech.com
> >
> >
>
>
Received on Wed Mar 21 2001 - 13:35:16 MST