From: Yasser Abdullah (yasser@alharbitelecom.com)
Date: Tue Apr 20 2004 - 04:01:01 GMT-3
Ahmed,
Yes, they have to be in the same area to establish L1 adj. Otherwise
you end up with and area mismatch error. Try it and debug isis adj to
see the error.
*Mar 1 03:22:22.825: ISIS-Adj: Area mismatch, level 1 IIH on
Ethernet0/0
*Mar 1 03:22:29.977: ISIS-Adj: Sending L1 LAN IIH on Ethernet0/0,
length 1497
*Mar 1 03:22:30.542: ISIS-Adj: Rec L1 IIH from 0030.8053.5cc0
(Ethernet0/0), cir type L1, cir id 0004.0004.0001.01, length 1497
If you could establish a L1 adj between routers in different areas, why
would you have L2 and L1/L2 routers?
HTH,
Yasser
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Ahmed Mustafa
Sent: Tuesday, April 20, 2004 6:25 AM
To: ccielab@groupstudy.com
Subject: ISIS L1/L2 Adjancey
IF I specically configure R1 and R2 to be as L1 only then
Are they required to be int the same area?
For example,
I have r1 connected to r2 both via Ethernet 0. Cisco routers by default
are
L1/L2 routers. I then configure
r1
interface ethernet 0
ip router isis
net 49.001.0001.0001.0001.00
r2
interface ethernet 0
ip router isis
net 49.0002.0002.0002.0002.00
The adjaceny will be established since both routers at this point are
L1/L2
regardless of different areas.
Now if I change the default settings from L1/L2 to L1 only by
configuring
is-type Level-1
Will it still work with both routers in different area?
The last one
I don't change the whole default-type, but just change the interface
only to
Level-1 by configuring
isis circuit-type level-1
All the help will be appreicated as I spent lot of time at CCO, but no
satisfactory answer.
Regards.
Teza
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