From: Andrew Moriarty (amgroupstudy@hotmail.com)
Date: Wed Nov 12 2003 - 12:33:59 GMT-3
I've had problems not only with ISIS, but also with OSPF and EIGRP. It seems
to be very version dependant. It used to be that when redistributing from
ISIS to either OSPF/RIP/EIGRP, you had to include a "redistribute
connected", but not with any combinations of the other protocols.
However I've had a variety of scenarios recently where I had to include
"redistribute connected" between OSPF/EIGRP, and I think, but am not sure,
rip. I couldn't adequately test this at the time, but I remember clearly
several problems that required this solution.
It appears to be a version specific issue, but I have no idea which
versions.
The information in the archives is correct, but the stuff from a year ago on
this subject is not necessarily valid now. It worked that way until about
the late spring, and then there was some chatter about new problems.
So the answer is: It depends!
am
>From: "Joe Chang" <changjoe@earthlink.net>
>Reply-To: "Joe Chang" <changjoe@earthlink.net>
>To: <ccielab@groupstudy.com>
>Subject: Re: ISIS to OSPF redistribution
>Date: Wed, 12 Nov 2003 01:58:32 -0800
>
>Thank you Peter. Any idea why ISIS alone has this limitation?
>
>----- Original Message -----
>From: "CXP Peter" <peter@cyscoexpert.com>
>To: <ccielab@groupstudy.com>
>Sent: Tuesday, November 11, 2003 10:49 PM
>Subject: Re: ISIS to OSPF redistribution
>
>
> > Directly connected routes do not get redistributed into other protocols
>if
> > they sit in ISIS and you perform "redistribute isis". You have to
>separately
> > "redistribute connected" into such protocol to get all the routes going.
> >
> > _______________
> > Peter
> > #7247 (R&S, Security, SP)
> > CyscoExpert Corp.
> > 4433 W. Touhy Ave. Suite 410
> > Lincolnwood, IL 60712
> > ph (847) 674-3392
> > fax (847) 674-2625
> > toll free (866) CyscoXP
> >
> > ----- Original Message -----
> > From: "Joe Chang" <changjoe@earthlink.net>
> > To: <ccielab@groupstudy.com>
> > Sent: Wednesday, November 12, 2003 2:58 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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