RE: Trouble with Multi-Area ISIS instance

Tolulope,

I am assuming you are referencing me when you say Scott. Route-leaking is a
solution to maintain the single AS while having the disconnected L2
databases. Unfortunately it is a mess due to your topology and that you
will need to leak all routes between the two L2's.

Regards,
 
Tyson Scott - CCIE #13513 R&S, Security, and SP
Technical Instructor - IPexpert, Inc.
Mailto: tscott_at_ipexpert.com

-----Original Message-----
From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
Tolulope Adeniji
Sent: Tuesday, May 18, 2010 6:24 AM
To: Rich Collins
Cc: Hewie McDuck; ccielab_at_groupstudy.com
Subject: Re: Trouble with Multi-Area ISIS instance

Hi Scott,

I've used a GRE tunnel between R1 and R4 to link the L2 database but i've
got L1 links on R1 and R4 connected to R2 and R3 respectively within the
same area. To have R1 and R4 run two areas i used the isis area tagging
option but this is in my own view sets up to two different isis process. is
it possible to acheive one instance of isis with different areas on the same
router?

On Mon, May 17, 2010 at 6:57 PM, Rich Collins <nilsi2002_at_gmail.com> wrote:

> L2 (Area 0002) -> L1 (Area 0001)-> L1 (Area 0001) -> L2 (Area 0002)
> R1 R2 R3
> R4
>
>
> You can configure both areas under the isis routing process on R2 and
> R3 for example and limit the clns type adjacencies on the interfaces
> to L1 or L2. Then you could use route-leaking.
>
> I guess the problem will come on R3 for example to redistribute those
> "inter-area" (from R1) type routes in the L1 database to its L2
> database. I'm not sure if that is possible since it runs contrary to
> the purpose of an L1 area not meant to be a backbone.
>
> -Rich
>
>
>
> On Mon, May 17, 2010 at 11:45 AM, Hewie McDuck <hmd2207_at_gmail.com> wrote:
> > Couldn't you use route-leaking? Leak the L2 routes into L1 at each end.
> By
> > default, the L1 are added to the L2 database at the far end. Use the
> > command "isis circuit-type" on the interfaces to get them into the right
> > database.
> >
> > Hewie
> >
> > -----Original Message-----
> > From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> > Tolulope Adeniji
> > Sent: Monday, May 17, 2010 1:47 AM
> > To: ccielab_at_groupstudy.com
> > Subject: Trouble with Multi-Area ISIS instance
> >
> > Hi
> >
> > Please how do you run a multi-area ISIS on a router under one ISIS
> > instance/process? How do i form a converged isis database between two
> > discontigous L2 links separated by L1 links as shown below;
> >
> > L2 (Area 0002) -> L1 (Area 0001)-> L1 (Area 0001) -> L2 (Area 0002)
> >
> > Cheers

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Received on Tue May 18 2010 - 09:32:19 ART