From: ccie2be (ccie2be@nyc.rr.com)
Date: Wed Nov 12 2003 - 23:45:33 GMT-3
Does that mean that to get these routes into OSPF, redist connected is
needed?
----- Original Message -----
From: "iron_tri" <iron_tri@msn.com>
To: "Joe Chang" <changjoe@earthlink.net>; <ccielab@groupstudy.com>
Cc: "Brian Dennis" <bdennis@internetworkexpert.com>
Sent: Wednesday, November 12, 2003 8:12 PM
Subject: Re: ISIS to OSPF redistribution
> I took a class from Brian Dennis/Brian Mcgahan; and I believe that Brian
> Dennis gave the following explanation for this redistribution scenario:
The
> router sees the participating ISIS routes (they are also connected routes)
> on R1 as CLNS routes, not IP routes, even though you are running ISIS for
> IP. Therefore, they don't get marked as IP routes in the routing
database,
> and they are not marked to be forwarded into another IP Routing protocol
> upon redistribution because they are marked in the database as CLNS
routes.
>
> Brian?
>
>
> ----- Original Message -----
> From: "Joe Chang" <changjoe@earthlink.net>
> To: <ccielab@groupstudy.com>
> Sent: Wednesday, November 12, 2003 1:58 AM
> Subject: ISIS to OSPF redistribution
>
>
> > This issue was raised here a few years back in the archives, but wasn't
> > resolved.
> >
> > R1 redistributes ISIS into OSPF:
> >
> > router ospf 1
> > redistribute isis level-1-2 subnets
> >
> > ISIS is configured on the local router as such:
> >
> > router isis
> > net 49.0001.0000.0000.0001.00
> > passive-interface lo0
> >
> > int s1/0.1
> > ip router isis
> > isis circuit-type level-1-2
> >
> > ISIS puts these two interfaces into its level-1 database. It also
receives
> a
> > route from an ISIS neighbor, R2. (I can post up the ISIS database if any
> wants
> > to see it).
> >
> > The only ISIS route that finds its way into OSPF is the route from R2.
The
> > directly connected ISIS routes (the serial subinterface and loopback) do
> not
> > make into the OSPF external route table. In the archive, it seems to
been
> have
> > determined that OSPF would not import routes if those same routes were
> also
> > directly connected. However I substitued ISIS with EIGRP and the routes
> were
> > successfully introduced into OSPF. RIP worked the same way ( I did not
> > redistribute connected into OSPF).
> >
> > I also tried fiddling around with the isis circuit types, making the
> serial
> > subinterface a level-2 only circuit, as well as the ISIS routing as
> level-2
> > only, with no results.
> >
> > Am I missing something embarrassingly obvious? Help !
> >
> > Thanks,
> > Joe
> >
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