From: Hunt Lee (huntl@webcentral.com.au)
Date: Mon Mar 03 2003 - 21:30:54 GMT-3
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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