From: David Hurtado (dei2viccie@hotmail.com)
Date: Sun Apr 04 2004 - 15:26:11 GMT-3
Yes, the Level-1-2 router has an active Level-2 adjacency, so it is supposed
to send Level-1 LSPs with the ATT bit set.
The point is that Level-1 doesn't see the default route when i introduce the
"passive-interface" command. Is it usual?
Maybe there is some problem with the routers, because they were giving me
weird problems with the BGP peering also.
>From: Peter van Oene <pvo@usermail.com>
>Reply-To: Peter van Oene <pvo@usermail.com>
>To: ccielab@groupstudy.com
>Subject: RE: Strange route leaking situation
>Date: Sun, 04 Apr 2004 12:31:34 -0400
>
>At 09:12 AM 4/4/2004, David Hurtado wrote:
>>OK, now i think i know what's going on:
>>
>>I have introduced "passive-interface loop 0" in the IS-IS routing process:
>>
>>router isis TODOS
>>net 49.2490.0001.0001.0006.00
>>net 49.0001.0001.0001.0006.00
>>log-adjacency-changes
>>passive-interface Loopback0
>>
>>So R6 (Level-1-2 router) announced to BB1 (Level-1 router) only the route
>>to the loopback, not the default route.
>>
>>If i take off the "passive-interface" command and reload, then the default
>>route appears in the Level-1 router.
>>
>>This is what i deduce:
>>
>>- If the Level-1-2 router doesn't introduce any kind of route in Level-1
>>area, then it will introduce a default route.
>>
>>- If the Level-1-2 router does introduce some route in Level-1 area, then
>>it will NOT introduce a default route.
>>
>>
>>Am i wrong? Please tell me if my deductions are rigth, please.
>
>Level 1/2 routers never introduce a default (ie put one in a 128 or 135
>TLV) unless you redistribute one, or use a default orig type statement.
>However, this router must have an active L2 adjacency for it to set the ATT
>bit which will govern whether or not L1 routers set default toward it.
>
>
>
>>Thanks a lot for all your attention and help
>>
>>
>>
>>
>>
>>
>>
>>
>>>From: "David Hurtado" <dei2viccie@hotmail.com>
>>>Reply-To: "David Hurtado" <dei2viccie@hotmail.com>
>>>To: yuchunyan@hotmail.com, ccielab@groupstudy.com, mickdcsw@charter.net
>>>Subject: RE: Strange route leaking situation
>>>Date: Sun, 04 Apr 2004 14:55:01 +0200
>>>
>>>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
>>>>>
>>>>>_________________________________________________________________
>>>>>Consigue aqum las mejores y mas recientes ofertas de trabajo en Amirica
>>>>>Latina y USA: http://latino.msn.com/empleos
>>>>>
>>>>>_______________________________________________________________________
>>>>>Please help support GroupStudy by purchasing your study materials from:
>>>>>http://shop.groupstudy.com
>>>>>
>>>>>Subscription information may be found at:
>>>>>http://www.groupstudy.com/list/CCIELab.html
>>>
>>>_________________________________________________________________
>>>Protege tu correo del spam y los virus con MSN 8. Prueba gratis dos meses
>>>MSN 8. http://join.msn.com/?pgmarket=es-es&XAPID=199&DI=1055
>>>
>>>_______________________________________________________________________
>>>Please help support GroupStudy by purchasing your study materials from:
>>>http://shop.groupstudy.com
>>>
>>>Subscription information may be found at:
>>>http://www.groupstudy.com/list/CCIELab.html
>>
>>_________________________________________________________________
>>Encuentra a tu media naranja entre los perfiles que mas te gusten. Toda la
>>magia del romance en MSN Amor & Amistad. http://match.msn.es/
>>
>>_______________________________________________________________________
>>Please help support GroupStudy by purchasing your study materials from:
>>http://shop.groupstudy.com
>>
>>Subscription information may be found at:
>>http://www.groupstudy.com/list/CCIELab.html
>
>_______________________________________________________________________
>Please help support GroupStudy by purchasing your study materials from:
>http://shop.groupstudy.com
>
>Subscription information may be found at:
>http://www.groupstudy.com/list/CCIELab.html
This archive was generated by hypermail 2.1.4 : Mon May 03 2004 - 19:48:42 GMT-3