From: ALL From_NJ (all.from.nj@gmail.com)
Date: Sun Feb 22 2009 - 22:19:02 ARST
(had to practice my doc look-up skills ...)
Link to WCCP (watch the ugly word wrap):
From this link:
Understanding WCCP
WCCP uses Cisco Content Engines (or other content engines running WCCP) to
localize web traffic patterns in the network, enabling content requests to
be fulfilled locally. Traffic localization reduces transmission costs and
download time.
WCCP enables Cisco IOS routing platforms to transparently redirect content
requests. The main benefit of transparent redirection is that users need not
configure their browsers to use a web proxy. Instead, they can use the
target URL to request content, and have their requests automatically
redirected to a content engine. The word "transparent" in this case means
that the end user does not know that a requested file (such as a web page)
came from the content engine instead of from the originally specified
server.
~~~~~~~~~~~~~~~
We used to use this protocol to redirect traffic to an Expand Accelerator.
We only wanted to direct specific types of traffic to our unit, and not all
traffic. By configuring this in the customer network, we were able to come
in and set in a demo unit without reconfiguring the client PCs. Kind of
cool ... and was transparent to the desktop tech support staff and the end
users.
Would suggest to practice some of the configs, but not to worry about too
much ... the config guide has several config examples.
HTH,
Andrew Lee Lissitz
On Sun, Feb 22, 2009 at 2:56 PM, shiran guez <shiranp3@gmail.com> wrote:
> Basiclly WCCP web cach control protocol was called like that as in ver 1 it
> was relevant for web traffic but the version 2 has many enahcments
> additionly like support for tcp udp icmp support for multiple cache
> engines.
> and more. the basic concept behind wccp in the router side is a
> sophisticated PBR (policy based routing) allowing to redirect traffic to a
> network node for further manipulation. the server side of the WCCP mean the
> network node that the traffic was redirected to can be a cache engine for
> web like squid or cisco cache engine or can be even Expand's network
> Accelerator (there are more options like juniper and others).
>
> The directions in the statements under the interface is the direction of
> the
> traffic in relation to the interface so if you say redirect in it mean that
> traffic comming in to the interface will be intercepted and redirect out
> mean that traffic on the way out from the interface will be redirected just
> like ACL assigments.
>
>
>
>
> On Sun, Feb 22, 2009 at 9:29 PM, Tharak Abraham <tharakabraham@gmail.com
> >wrote:
>
> > Hi,
> >
> > Could you please brief here the concept of packet redirection on and
> > outbound and inbound interface ?
> > Got confused with the wccp commands "ip wccp web-cache redirect out" and
> > "ip
> > wccp web-cache redirect in"
> >
> > Thanks in advance,
> >
> > BR,
> > Tharak.
> >
> >
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>
>
> --
> Shiran Guez
> MCSE CCNP NCE1 JNCIA-ER CCIE #20572
> http://cciep3.blogspot.com
> http://www.linkedin.com/in/cciep3
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
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-- Andrew Lee Lissitz all.from.nj@gmail.comBlogs and organic groups at http://www.ccie.net
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