From: Hunt Lee (huntl@webcentral.com.au)
Date: Tue Mar 04 2003 - 03:26:27 GMT-3
That's not what I'm seeing though...
From my original diagram, all ISIS routes comes up as L1, while the ones
from external routing protocol is easily controlled by the redistribution
command...
Hunt
-----Original Message-----
From: Ali Fahmi [mailto:afahmi@plasa.com]
Sent: Tuesday, 4 March 2003 1:55 PM
To: ccielab@groupstudy.com
Subject: Re: ISIS L1/L2 mystery
ISIS will decide L1 if the router get ISIS update from
same Area,
or decide L2 if get from another area,
if there is a redistribution, we should state whether
entry redistributed will be L1 or L2,
by default is L2,
Ali Fahmi
On Tue, 4 Mar 2003 10:30:54 +1000
Hunt Lee <huntl@webcentral.com.au> wrote:
>Hi Annu, Peter,
>
>I left all of my routers a L1/L2 (default)... so how does
>it decides whether
>it gets a L1 or L2 route?
>
>Thanks in advance,
>
>Best Regards,
>Hunt
>
>
>-----Original Message-----
>From: Annu Roopa [mailto:annu_roopa@yahoo.com]
>Sent: Tuesday, 4 March 2003 2:29 AM
>To: Hunt Lee; ccielab@groupstudy.com
>Subject: Re: ISIS L1/L2 mystery
>
>
>Hunt,
>How have ur routers been setup ? i mean L1/L2 or L1 etc ?
>As u have written
>a router within a area (if defined as L1 type under
>routers isis) will
>receive only L1 routes. A L1/L2 router will receive both
>L1/L2 routes and
>show it up in its IP table.
>In ur config the routers RTC and RTA should be L1/L2 type
>so that they
>exhange the L1/L2 routes between each other.Others would
>be L1 type in their
>respective areas and they would see only L1 routes and a
>default route to L2
>if i remember right.
>When redistributing the metric-type sets the type as L1
>or L2 (as u might
>know) and this setting will decide if the routes show up
>on ur L1 routers or
>not as L1/L2 would see it all.
>Let us know. Hope that helps.
>Annu
>
> Hunt Lee <ciscoforme3@yahoo.com.au> wrote:Hi guys,
>
>I did a lab scenario on ISIS. I got all the routes
>correctly on all of my
>routers.
>However, some of my routes have got different L1 / L2
>tags than as the model
>answer.
>
>How do we determine whether a particular ISIS route will
>be L1 or L2?
>
>- if the ISIS network is within the same ISIS area, then
>it is L1
>- if it is from a different ISIS area, it is L2
>
>So in the topology...
>
>RTC---RTD (top two is in ISIS Area 1)
>|
>RTA---RTB (bottom four is in ISIS Area 2)
>| \
>RTE RTF
>
>Or does it depends on ISIS Router types / redistribution
>commands...
>
>
>Any help / ideas would be greatly appreciated.
>
>Regards,
>Hunt
>
>
>
>
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