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Re: Anyone use Cisco Policy Routing?

  • From: clarke
  • Date: Fri Sep 14 16:29:47 2001

This does not sound like a problem with IOS, but more like a problem with
the configuration. Packets matching in your access
list will go to the designated next hop. Those failing to match will not be
discarded. These packets will take the course of the routing table.

Where are you trying to apply the route map? The interface or the routing
protocol? For what you're doing, you should apply the Route Map to an
incoming interface.

Try another matching statement with a lower precedence under your Policy.

Ex:

route-map Stephen_Policy permit 10
match ip address access_list_A
set ip next hop A.A.A.A

route-map Stephen_Policy permit 20
match ip address access_list_B
set ip next hop B.B.B.B

route-map Stephen_Policy permit 30
match ip address default_list
set ip next hop C.C.C.C

~ Clarke ~


----- Original Message -----
From: Stephen J. Wilcox <steve@opaltelecom.co.uk>
To: <nanog@merit.edu>
Sent: Friday, September 14, 2001 1:28 PM
Subject: Anyone use Cisco Policy Routing?


>
> 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
>
>