From: David Hurtado (dei2viccie@hotmail.com)
Date: Sun Apr 04 2004 - 09:55:01 GMT-3
Hello,
Althouth some of you gave me an answer about this topic, I have to go back
over it.
Today i'm working over the same configurations as on Friday. Before, the
Level-1-2 router (R6) introduced a default route to the Level-1 router
(BB1). You told me that this is the default behaviour of a Level-1-2 router.
Now it doesn't introduce any default route at all. WHY?
Did somebody suffer something similar any time?
I don't understand it. Could somebody help me please? i'm getting crazy with
all this stuff.
Thanks a lot
>From: "yu chunyan" <yuchunyan@hotmail.com>
>To: dei2viccie@hotmail.com
>Subject: RE: Strange route leaking situation
>Date: Sat, 03 Apr 2004 12:26:12 +0800
>
>Even R6 doesnot receive default route from L2 neighbors, it still
>distribute a default route to BB1. This is default action for L1/2 router.
>
>Bin
>
>
>>From: "David Hurtado" <dei2viccie@hotmail.com>
>>Reply-To: "David Hurtado" <dei2viccie@hotmail.com>
>>To: ccielab@groupstudy.com
>>Subject: Strange route leaking situation
>>Date: Fri, 02 Apr 2004 20:53:59 +0200
>>
>>Helo everybody,
>>
>>I thougth that i have understood IS-IS route leaking and when it's needed,
>>but a have found a suprising situation that i cannot explain:
>>
>>
>>(BB1)ATM0/0.201-------------------------- Dialer6 (R6)
>>Ethernet2/0--------------------Level-2 routers
>> Level 1 router Level 1/2 router
>>
>>
>>
>>R6 connects to a Level-1 router (BB1) thru Dialer 6 and to a group of
>>Level-2 routers thru the Ethernet 2/0. R6 receives a Level-2 default route
>>from the group of Level-2 routers:
>>
>>
>>interface Ethernet2/0
>>ip router isis TODOS
>>isis circuit-type level-2-only
>>
>>
>>interface Dialer6
>>ip address 54.1.8.6 255.255.255.0
>>ip router isis TODOS
>>isis circuit-type level-1
>>
>>
>>router isis TODOS
>>net 49.2490.0001.0001.0006.00
>>net 49.0001.0001.0001.0006.00
>>
>>
>>
>>R6#sh ip route
>><snip>
>>i*L2 0.0.0.0/0 [115/20] via 204.12.1.3, Ethernet2/0
>>
>>
>>
>>BB1 connects to R6 thru a Level-1 association and receives the default
>>route as Level-1!!!!!!!:
>>
>>
>>interface ATM2/0
>>no ip address
>>no atm ilmi-keepalive
>>pvc 0/5 qsaal
>>!
>>pvc 0/16 ilmi
>>!
>>interface ATM2/0.301 point-to-point
>>pvc 1/301
>> protocol ppp Virtual-Template11
>>!
>>interface Virtual-Template11
>>ip router isis 1
>>
>>router isis 1
>>is-type level-1
>>
>>
>>BB1#s ip route
>><snip>
>>i*L1 0.0.0.0/0 [115/10] via 54.1.8.6, Virtual-Access3.1
>>
>>
>>The default route is the only Level-2 route that R6 passes to BB1.
>>
>>From what i know about IS-IS, by default a Level-1/2 router (R6) doesn4t
>>pass Level-2 routes to a Level-1 router (BB1). You need route leaking to
>>pass Level-2 routes to a Level-1 area.
>>
>>Could somebody tell why it works in this way?
>>
>>If you want more debugs or shows, just tell me.
>>
>>Thanks for the help
>>
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