From: Andy (and123and@googlemail.com)
Date: Tue Mar 04 2008 - 15:06:36 ARST
looks like the RIP originated routes are being advertised back to the
RIP/OSPF router via OSPF, and the RIP/OSPF router obviously chooses OSPF,
this is why you need RIP to be the preferred AD.
This can happen even if you only have the one point of redsitribution
between RIP and OSPF, in the RIP/OSPF router do a "sh ip route xxx" and see
who is advertising the "rogue" route. I remember a lab with IE who had this
very same scenario. A diag to see the bigger picture is what the guys are
asking for, there is no need to take out your frustration on the guys trying
to help :-|
On 04/03/2008, Sadiq Yakasai <sadiqtanko@gmail.com> wrote:
>
> Hey John :) i think I got a hold of the scenario here, see if its wat
> you are trying to explain:
>
> From what I understand here, you seem to have a loop in the OSPF
> domain where the rip routes are redistributed in OSPF but they go into
> the OSPF domain and have the potential of cycling and coming back to
> this router that is actually redistributing these routes.
>
> When they come back to this router (if they do), they have the
> potential of displacing the RIP routes and thereby disrupting this
> routers belief of where the routes actually originated from because of
> the fact that OSPF routes (AD 110) will displace RIP routes (AD 120).
> Now the safest practice here is to make RIP routes have an AD of 109
> so that no matter what, this router will always prefer the RIP
> prefixes and will always redistribute them into OSPF.
>
> HTH
>
> Sadiq
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
This archive was generated by hypermail 2.1.4 : Tue Apr 01 2008 - 07:53:52 ART