From: Paul Borghese (pborghese@xxxxxxxxxxxxxx)
Date: Mon Jul 22 2002 - 18:16:11 GMT-3
Make sure the simple act of taking down the ISDN link is not causing a
typology change. This occurs in some instances where the route for the ISDN
line is being redistributed into another protocol -- then distributed back
into OSPF.
Paul
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of kym
blair
Sent: Monday, July 22, 2002 3:38 PM
To: limmt@lycosasia.com; ccielab@groupstudy.com
Subject: Re: OSPF keeps bringing up DDR across asyn line
Ivan,
Try three things:
(1) add "no peer neighbor-route" to both routers.
(2) add "ip ospf cost 9999" to both routers, so other path is preferred.
(3) Easy solution; you were smart and did not include this in area 0. Make
area 10 a stub area so it doesn't get summary LSAs from area 0.
HTH, Kym
>From: "Ivan" <limmt@lycosasia.com>
>Reply-To: "Ivan" <limmt@lycosasia.com>
>To: <ccielab@groupstudy.com>
>Subject: OSPF keeps bringing up DDR across asyn line Date: Mon, 22 Jul 2002
>20:16:22 +0800
>
>Hi,
>
>I've configured AUX back to back to simulate DDR across ISDN.
>I've also configure it as a IP OSPF Demand Circuit.
>
>However OSPF continues to bring up the link.
>The link is under an OSPF area 10.
>
>The debug dialer shows the reason for the link being bring up:
>-------------------------------------------------------------
>Mar 4 03:59:57.249 EST: As1 DDR: rotor dialout [priority]
>Mar 4 03:59:57.253 EST: As1 DDR: Dialing cause ip (s=110.99.25.2,
>d=224.0.0.5)
>Mar 4 03:59:57.257 EST: As1 DDR: Attempting to dial 1234
>Mar 4 03:59:57.257 EST: CHAT1: Attempting async line dialer script
>Mar 4 03:59:57.261 EST: CHAT1: Dialing using Modem script: isdn & System
>script
>: none
>Mar 4 03:59:57.269 EST: CHAT1: process started
>Mar 4 03:59:57.269 EST: CHAT1: Asserting DTR
>Mar 4 03:59:58.197 EST: CHAT1: Chat script isdn started
>Mar 4 03:59:58.201 EST: CHAT1: Chat script isdn finished, status = Success
>MU-R2#
>
>----------------------------------------------------------------
>
>Since the hello is suppressed over the point to point dialer link,
>I'm not sure what OSPF is sending out on the all router multicast address
>across the dialer interface. The other reason i can think of is when a
>topology change that trigger the link but there is none.
>
>Appreciate if anyone can advice on this.
>
>Thanks
>Ivan Lim
>
>------------------------------------------------------------------------
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