Re: Connecting ISIS Level-1 Router To Multiple Level-1-2 in

Hi Brian&Marko

Forgot to mention this is a solution we used in the past and after a few
loops due to other reasons, during the cleanup it was decide to abandon the
use of multiple net addresses and customer highly unlikely to accept this
solution in the forseable future.

On 1 October 2012 19:49, Marko Milivojevic <markom_at_ipexpert.com> wrote:

> I tried this on both IOS and Junos and it worked. I'm not quite sure
> of your approach... Some code-sharing would be nice for us to be able
> to help better.
>
> In reality, all you have to do is to make sure your L1/L2 routers have
> multiple NET addresses of which one is in L1 and other in L2.
>
> --
> Marko Milivojevic - CCIE #18427 (SP R&S)
> Senior CCIE Instructor - IPexpert
>
> On Mon, Oct 1, 2012 at 8:17 AM, Edmore Chingwena <chingwenaed_at_gmail.com>
> wrote:
> > Hi Experts
> >
> > I have a question I wish to check. What will be the best way to connect a
> > Level-1 router to Multiple Level-1-2 routers in different IS-IS areas.
> > Defaultly this not possible but wish to check if anyone has used some
> > stupid router tricks to get this to work or there is an RFC or draft.
> > Something I have tested is using multiple processes and redistributing
> on
> > one of the L1/2 routers at one point with a route-policy.
> >
> > Redistribution will be last resort wanted to check if there are any other
> > alterves in a multivendor environment where the L1 router is most likely
> > not cisco and 90% chance that one of the L1/L2 is also not Cisco.
> >
> > Example
> >
> > R1 is L1 R2 is L1/2 and R3 is L1/2
> >
> > R1 is hard-coded as L1 connects to R2 and R3 and is running IS-IS
> Level-1
> > to the two
> >
> > Example Area design
> >
> > R1 49.0001.0100.0000.1111.00
> > R2 49.0001.0100.0000.2222.00
> > R3 49.0003.0100.0000.3333.00
> >
> > The requirements I have are the same as what Cisco calls multi-area ISIS
> > but seems not to work with some of the codes I have in my current
> > environment in a test environment as well.
> >
> >
> > Regards
> > Edmore Chingwena
> > CCIE#36714 SP
> >
> >
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> >
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Received on Mon Oct 01 2012 - 21:26:10 ART