From: A Paradela (aparadela@earthlink.net)
Date: Sun Sep 28 2003 - 09:56:05 GMT-3
I guess I have an older version of Doyle's Vol I which does not have that
strategy. Normally here's what I do with a single redist point between
protocols (RIP network is 135.3.1.0/24, everything else is OSPF)
ip acce s ripnets
permit 135.3.1.0 0.0.0.255
route-map rip
match ip addr ripnets
route-map ospf deny 10
match ip addr ripnets
route-map ospf permit 20
router ospf 1
redist rip route-map rip subnets metric 120
router rip
redist ospf 1 route-map ospf 1 metric 3
I started to think it through and this is what I would add, but I'm not
sure. Can you confirm? I don't want to change every OSPF distance to 240
since I'm not sure how to put them back depending on route type (external,
intra, etc.) Instead I'm raising any RIP network being sent to me from an
OSPF neighbor to a dist of 240.
router ospf 1
distance 240 0.0.0.0 0.0.0.0 ripnets
router rip
distance 240
distance 120 0.0.0.0 0.0.0.0 ripnets
Thanks, AP
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
christopher snow
Sent: Sunday, September 28, 2003 7:12 AM
To: chipn@intraworx.net
Cc: ccielab@groupstudy.com
Subject: Re: Mutual redistribution.
Doyle covers this in TCP/IP Vol I very well in the
redistribution section. I have adopted his method and
it works every time. He uses the distance command and
sets both protocols above their normal distance...
i.e. if you were doing EIGRP and OSPF set both
protocols at 130. Then use route maps to drop the
selected routes back to their normal distance within
each protocol. This prevents route feedback and
establishes redundancy if you have more than one point
of redistribution.
HTH
Chris Snow
--- chipn@intraworx.net wrote:
> I'm looking for opinion on lab strategy.
>
> If you encounter a mutual redistribution scenario
> with multiple
> redistributions points on the lab, would it be in
> your best interest to
> explictly control your routing information to
> prevent route feedback? It
> is possible to have complete connectivity in this
> scenario without
> filtering, but still have the potential for routing
> loops.
>
> I thought this would be the best place to get some
> expert advice on the
> subject.
>
> Thanks.
>
> ***Get your CCIE and a FREE vacation:
> Shop.GroupStudy.com***
>
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