From: Gustavo Novais (gustavo.novais@novabase.pt)
Date: Sun Aug 21 2005 - 07:47:06 GMT-3
Hello,
The thing here is that inside an ISIS area L1 routes are preferred over
L2 routes, so what you may see by inspecting sh isis database detail is
that you have both routes either as L2 and as L1, if the circuit type
between those two routers is L-1-2. The thing is that you only see L1
routes on the routing table because they are preferred. (Were you
expecting to see L1 and L2 on same routes?)
HTH
Gustavo
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Hector Fernandez
Sent: domingo, 21 de Agosto de 2005 11:43
To: Anton Yurchenko; ccielab@groupstudy.com
Subject: Re: effect of "redistribute ospf level-1-2" in ISIS
Hi Anton,
AFAIK, Level-1 or Level-2 have to do with the kind of adjacencies
routers create. If both are level1-2, they'll create both L2 and L1
adjacencies.
By having a L1 beside a route means you've learned the route via an L1
neighbor. Same applies to L2.
If you want to see the type of route, you can look at the metric. If
it's greater that 64 (extended metric), it's external (or someone forced
extended metric).
If you look at the isis database details you'll see the tag
"IP-external"
on the redistributed (external) routes (sh isis data detail).
Regards
Hector
----- Original Message -----
From: "Anton Yurchenko" <phila@cascopoint.com>
To: <ccielab@groupstudy.com>
Sent: Sunday, August 21, 2005 4:25 AM
Subject: effect of "redistribute ospf level-1-2" in ISIS
> Hi All,
>
> I`m redistributing OSPF into ISIS, and external routes show up as L2.
> With "level-1-2" option they show up in ISIS domain as L1. So how is
> "level-1-2" different from just "level-1" ?
>
> Thanks,
>
>
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