From: Nodir Nazarov (nodir@xxxxxxxxxxxx)
Date: Thu Mar 01 2001 - 14:41:35 GMT-3
Jim,
The problem was - R4 had 2 sources for the route OSPF and EIGRP external.
It preferred external EIGRP over OSPF. I didn't have any redistributing
issues even though no filters were configured.
And here is my question (follow up on previous threads from which I could
not get answers) - why would you set filters on the scenario below ?
EIGRP/OSPF redistribution bothers me a lot.
Nodir
On Thu, 1 Mar 2001 Jim.Fickett@SAPPI-NA.COM wrote:
> How is R3 configured to prevent the EIGRP route that is redistributed into
> OSPF from being redistributed back into EIGRP and vice versa with OSPF to
> EIGRP?
>
>
> Jim Fickett
>
> -----Original Message-----
> From: Nodir Nazarov [mailto:nodir@datatone.com]
> Sent: Thursday, March 01, 2001 11:44 AM
> To: frank wells
> Cc: ccielab@groupstudy.com
> Subject: Re: route artifact revisited
>
>
>
> By the way - I could reproduce Chuck's scenario.
>
> To recap:
>
> R1---R4
> | |
> R3--R6
>
> R1 - ospf only, R6 - eigrp only. R3 - mutually distributes each other. R4
> - runs both protocols, but does not redistribute.
>
> On R4 I got connected router (between R1 and R3) as EIGRP external. Had it
> at least for 17 minutes. Checked after 10 minutes - got right one. After a
> while - EIGRP external showed up. So it's flapping.
>
> EIGRP - 172.16.0.0
> OSPF - 192.168.13.0 (between R1 and R3), 192.168.14.0 (R1 and R4)
>
> Nodir
>
>
>
> On Thu, 1 Mar 2001, frank wells wrote:
>
> > What prefixs' are you using on the OSPF and EIGRP sides?
> >
> >
> > >From: "Chuck Larrieu" <chuck@cl.cncdsl.com>
> > >Reply-To: "Chuck Larrieu" <chuck@cl.cncdsl.com>
> > >To: "CCIE_Lab Groupstudy List" <ccielab@groupstudy.com>
> > >Subject: route artifact revisited
> > >Date: Wed, 28 Feb 2001 23:12:41 -0800
> > >
> > >Practicing redistribution for the next couple of days. My strange
> behaviour
> > >of the evening:
> > >
> > >Ospf domain --------------EIGRP domain
> > >Router_1-----------------------router_4 r4 runs ospf and eigrp but
> > >does not redistribute
> > >| /
> > >Router_3----------Router_6 r3 redistributes both ways, r6 is
> > >eigrp
> > >only
> > >
> > >The artifact - a route directly connected to an interface on R1 shows up
> on
> > >R4 and an eigrp external with a metric of 170. All other ospf routes are
> on
> > >r4 as they should be, with a metric of 110
> > >
> > >Several clear ip route * does not correct the situation. I shut off
> > >redistribution, do a clear ip ospf proc on R1, verify that the route in
> > >question is an ospf route on r4, reconfigure redistribution, and now
> > >everything is as it should be. I add redistribution back onto r3. The
> route
> > >in question remains an ospf route. I check the output of debug ip
> routing,
> > >and see that the ospf route is replacing the redistribute and now EIGRP
> > >route in R4's table.
> > >
> > >I can derive no good explanation. If I recall how I built the lab
> > >correctly,
> > >it is true I did not add OSPF to R4 until last, after redistribution was
> in
> > >place on r3. So the eigrp route would have been in r4's table already.
> But
> > >then, so were all of the other ospf routes, and when ospf was built, they
> > >appeared as ospf routes on r4
> > >
> > >I'm a bit puzzled by this. And open to a rational explanation.
> > >
> > >Chuck
> > >----------------------
> > >I am Locutus, a CCIE Lab Proctor. Xx_Brain_dumps_xX are futile. Your life
>
> > >as
> > >it has been is over ( if you hope to pass ) From this time forward, you
> > >will
> > >study US!
> > >( apologies to the folks at Star Trek TNG )
> > >
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