Re: Trouble with Multi-Area ISIS instance

Yes it is

All you would need to do is on the router interfaces connecting the
different areas use the isis circuit-type command

You might need to redist between L1 and L2 or Vice Versa depending on your
circumstances.

CCIE # 23962 (SP)

On Tue, May 18, 2010 at 12:23 PM, Tolulope Adeniji <toluadeniji_at_gmail.com>wrote:

> 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
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html

Blogs and organic groups at http://www.ccie.net
Received on Tue May 18 2010 - 13:35:24 ART