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Re: Anyone use Cisco Policy Routing?
From: Rodney Dunn <rodunn () cisco com>
Date: Sat, 15 Sep 2001 08:21:30 -0400


Stephen,

I'm wondering if I've got
a) an IOS bug

Send me the configuration and a description of what
you are trying to accomplish (ie. what packets you want
to redirect where) and I'll tell you if it's broken.


or if

b) I need to turn off some kind of route caching/cef that works at layer 3
altho I've disabled everything I could think of on the interface

You should *never* have to disable a switching path to make a feature
work.  If you do it's a bug and please open a TAC case on it so
the problem is fixed.  Cisco IOS switching paths are designed such
that if you enable a feature that is not supported in a particular
switching path then that packet is punted to the next switching path
to be handled.

Thanks,
Rodney
Escalation Engineer
Routing Protocols
Cisco Systems Inc.

On Fri, Sep 14, 2001 at 06:28:28PM +0100, Stephen J. Wilcox wrote:

Hi,
 I'm trying to setup a platform that will send different types of packets
over different routes, theres a good example of what I'm doing at

http://www.cisco.com/warp/public/cc/pd/ibsw/ibdlsw/prodlit/dlsw5_rg.htm

under 'Directing Traffic Flows with Policy Routing'

Basically, it doesnt work, I'm on IOS 12.0(3) and not sure if its a bug or
just me.

I'm using policy routing and route-maps to identify certain types of
traffic by tcp port number using extended access-lists and then change the
next-hop.

Whats happening is that it works okay until the above access-list makes a
match, after that all packets to that IP address regardless of port number
get sent via the modified next hop.


I'm wondering if I've got
a) an IOS bug

or if

b) I need to turn off some kind of route caching/cef that works at layer 3
altho I've disabled everything I could think of on the interface

Any thoughts?

Steve

-- 
Stephen J. Wilcox
IP Services Manager, Opal Telecom
http://www.opaltelecom.co.uk/
Tel: 0161 222 2000
Fax: 0161 222 2008



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