From: roger.wang\(shanghai\) (roger.wang@cyberplus.com.cn)
Date: Tue Apr 20 2004 - 05:17:19 GMT-3
----- Original Message -----
From: "Yasser Abdullah " <yasser@alharbitelecom.com>
To: "'Ahmed Mustafa'" <ahmed.mustafa@sbcglobal.net>;
<ccielab@groupstudy.com>
Sent: Tuesday, April 20, 2004 3:01 PM
Subject: RE: ISIS L1/L2 Adjancey
> 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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