From: Guy Farber (gfarber@xxxxxxxxx)
Date: Mon Jun 04 2001 - 09:34:58 GMT-3
Even better, if you are redistributing rip or igrp on the dialing router and
rip or igrp runs on the bri interface (passive interface won't help you) -
it will redistribute a new route into ospf which will bring up the ospf
demand-circuit.
The result is pretty amusing - whenever the line goes down it gets back up
because it sends a new type 5 lsa about the change in the state of the bri
link...
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Hugo Steiner
Sent: Mon, June 04, 2001 8:45 AM
To: Brian; ccielab@groupstudy.com
Subject: Re: OSPF Demand Circuit & Point to Point
Brian,
packets to 224.0.0.5 will still bring the link up when they are sent,
an OSPF Demand circuit surpresses LSA's that have already been sent, you
will probably find that the traffic getting through is a new or updated
LSA that hasn't been sent before.
One cause of this might be that you are using Dialer profiles, which
insert a host route into the routing table when the link comes up or
goes down, these then get redistributed into OSPF, and sent over the
serial link, they arrive at the other end of the link and the router
goes, oh, new LSA, better bring the dialer up to send it.
It's a vicious cycle.
Filter and summarise so as these host routes don't get into OSPF. But
the summary for the whole network is avalible.
R
Hugo
-- Hugo Steiner P: +61 2 4969 0176 The light at the end of the HunterLink Pty Limited F: +61 2 4969 0133 tunnel could be a dragon----- Original Message ----- From: "Brian" <signal@shreve.net> To: <ccielab@groupstudy.com> Sent: Monday, June 04, 2001 4:05 PM Subject: OSPF Demand Circuit & Point to Point
> I am working on a scenerio where a BRI line > is backing up a serial connection. The BRI > is set as an "ip ospf demand", yet I find > that packets to 224.0.0.5 are bringing the > link up still. If I set the network type > on the BRI lines to "ip ospf network non-broadcast" > then all is well, but if I leave it as the default > for a BRI, which is point-to-point, it will > keep getting brought up by traffic to 224.0.0.5. > > Does anyone have any insight to share? I have > seen plenty of demand circuit examples where it > just uses network type of point-to-point. > > Brian > > > ----------------------------------------------- > Brian Feeny e:signal@shreve.net > CCNP+Voice/ATM/Security p:318.222.2638x109 > CCDP f:318.221.6612 > Network Administrator > ShreveNet Inc. (ASN 11881) > **Please read:http://www.groupstudy.com/list/posting.html **Please read:http://www.groupstudy.com/list/posting.html **Please read:http://www.groupstudy.com/list/posting.html
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