From: Atif Awan (atifawan@xxxxxxxxxxx)
Date: Thu Feb 08 2001 - 16:21:26 GMT-3
What i have learnt after playing with this on demand circuit is that the
peer route is responsible for the external LSA being generated ... There are
two ways of avoiding the link flapping ... one is to use the route-map as
mentioned by someone and the other way is to add the command no neighbor
peer-route on the routers.
>From: Justin Menga <Justin.Menga@computerland.co.nz>
>Reply-To: Justin Menga <Justin.Menga@computerland.co.nz>
>To: "'Jack Reynolds'" <jacreyno@cisco.com>, Ccielab
><ccielab@groupstudy.com>
>Subject: RE: New command found in 12.0 IOS
>Date: Thu, 8 Feb 2001 14:52:07 +1300
>
>It would certainly stabilize external LSAs - problem is that it blocks ALL
>LSAs from exiting the interface.......so if the other end needs to know
>your
>LSAs.....
>
>I bet you have redistribution on the router, and that the other protocol
>includes your ISDN interface in it's 'network' classification - even though
>you are probably using passive-interface, the network is distributed into
>OSPF - when the link goes down, OSPF is updated via redistribution, hence
>LSA seq no is incremented, and OSPF demand circuit is brought up since LSA
>has changed.....so filter your redistribution....
>
>Regards,
>
>Justin Menga CCIE #6640 MCSE+I CCSE
>WAN Specialist
>Computerland New Zealand
>PO Box 3631, Auckland
>DDI: (+64) 9 360 4864 Mobile: (+64) 25 349 599
>mailto: justin.menga@computerland.co.nz
>web: http://www.computerland.co.nz
>
>
>-----Original Message-----
>From: Jack Reynolds [mailto:jacreyno@cisco.com]
>Sent: Thursday, 8 February 2001 1:37 p.m.
>To: Ccielab
>Subject: New command found in 12.0 IOS
>
>
>Has anyone tried the following command?
>
>"ospf database-filter"
>
>I am wondering if it would help stabalize external LSAs that are triggering
>an OSPF demand circuit...
>
>I came across this command while testing OSPF on demand circuits across
>ISDN. The design guide says to put your on demand circuits in a stub or
>nssa area whenever possible. I thought I would try to get it working w/o
>using a stub area. So, the On Demand Circuit resides in Area 0, and I
>cannot keep the link from bouncing. (Design guides are accurate beasts).
>I
>am finding External LSAs are bringing it up.
>
>If the above command could be applied, perhaps I could prevent the link
>from
>bouncing. I would try it but one of my ISDN routers is running 11.2.(16).
>
>Has anyone else tried this?
>
>2 days until my next attempt...
>
>
>Thanks,
>
>JR
>
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