From: ccie2002@tampabay.rr.com
Date: Mon Jul 28 2003 - 11:57:17 GMT-3
I just tried this doing level-1 only on R4 and level-2 only on R6. R5 was level-1-2
and it worked fine. I did not do any authentication.
R4---R5---R6
R5
R5#sho isis top
IS-IS paths to level-1 routers
System Id Metric Next-Hop Interface SNPA
R4 10 R4 Se0/0.2 DLCI 504
R5 --
IS-IS paths to level-2 routers
System Id Metric Next-Hop Interface SNPA
R4 **
R5 --
R6 10 R6 Se0/0.2 DLCI 406
R5#
R4
R4#sho isis top
IS-IS paths to level-1 routers
System Id Metric Next-Hop Interface SNPA
R4 --
R5 10 R5 Se0 DLCI 405
R4#
R6
R6#sho isis top
IS-IS paths to level-2 routers
System Id Metric Next-Hop Interface SNPA
R5 10 R5 Se0/0 DLCI 604
R6 --
R6#
----- Original Message -----
From: Jonathan V Hays <jhays@jtan.com>
Date: Monday, July 28, 2003 9:53 am
Subject: RE: ISIS neighbor
> Interesting problem. I tried something similar recently and was
> not able
> to get it to work unless both spokes were the same type. These
> were my
> results.
>
> L1--L1/L2--L1 Works okay
>
> L2--L1/L2--L2 Works okay
>
> L1--L1/L2--L2 Will NOT work
>
> Was I missing something in my config?
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [nobody@groupstudy.com] On Behalf Of
> wing_lam@jossynergy.com
> Sent: Monday, July 28, 2003 9:33 AM
> To: ccielab@groupstudy.com
> Subject: ISIS neighbor
>
>
> Hi Group,
>
> With the following scenario:
>
> R1, R2, R3 on the same subnet,
>
> When the question asking you to do:
>
> a) establish a R1--R2 L1 neighbor
> b) establish a R2--R3 L2 neighbor
> c) There should be no any neighbor relationship between R1 & R3
>
> I think it will be no problem for anybody in a) & b), but for c),
> I can
> think of two fast solution:
>
> 1) Set R1 as L1 only, R3 as L2 only
> 2) Set link authentication for R3's L1
>
> The question is open; (i.e. no request you to do any
> authentication or
> limitation)
>
> Which one is better? Or some other better solutions?
>
> Thx,
> BBD (Big Black Dog)
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