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

Jorge,

Many thanks for your follow up about this issue.

I heard (read) that kernel 2.4.x is still not good enough for production
machine. However, I will try it (your ip_wccp.c) in our trial machine.

Thx & rgds,

Awie

----- Original Message -----
From: "Jorge Boncompte [DTI2]" <jorge@dti2.net>
To: "Binaya" <binaya@mos.com.np>; "Joe Cooper" <joe@swelltech.com>
Cc: "Awie" <awie@eksadata.com>; <squid-users@squid-cache.org>
Sent: Thursday, March 22, 2001 4:34 AM
Subject: 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
> --------------------------------------------------------------
> C/ Abogado Enriquez Barrios, 5 14004 CORDOBA (SPAIN)
> Tlf: +34 957 761395 / FAX: +34 957 450380
> --------------------------------------------------------------
> jorge@dti2.net _-_-_-_-_-_-_-_-_-_-_-_-_-_ http://www.dti2.net
> ==============================================================
> Without wicker a basket cannot be done.
> ==============================================================
>
> ----- 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 Thu Mar 22 2001 - 08:10:58 MST