From: Patrick McKinnis (pmckinni@xxxxxxxxx)
Date: Thu Mar 02 2000 - 13:18:40 GMT-3
>From the Cisco Docs CD:
"With this feature [OPSF demand-circuit], periodic hellos are suppressed and
the periodic refreshes of LSAs are not flooded over the demand circuit.
These packets bring up the link only when they are exchanged for the first
time, or when a change occurs in the information they contain. This
operation allows the underlying datalink layer to be closed when the network
topology is stable."
I ran into similar problems with this topic some time ago, and also
experimented with the denial of OSPF using the dialer-list. However, I have
this feature working presently in my lab with a "wide-open" dialer list, and
the ISDN circuit is quiet as a mouse -- and does activate with a ping
between the two routers.
Experiment and I think you'll find that it does indeed supress the hello's &
LSA's.
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> Joel W. Ekis
> Sent: Thursday, March 02, 2000 7:44 AM
> To: Rob Barton; ccielab@groupstudy.com
> Subject: Re: IP OSPF Demand Circuit
>
>
> The demand-circuit only prevents the LSA's from aging. It does
> not stop the hello's. You need to modify your dialer-list to deny ospf.
>
> dialer-list 1 protocol ip list 101
> access-list 101 deny ospf any any
> access-list 101 permit ip any any
>
> Joel
>
> At 08:43 AM 3/1/2000 -0800, Rob Barton wrote:
> >Hi all, I am new to this group and am already impressed with the high
> >level of discussion that has been going on. I am scheduled to write the
> >exam in San Jose on June 29,30
> >
> >I have an OSPF config problem maybe someone can help me with. OSPF is
> >configured across my BRI line (not as a backup interface, but just with
> >a higher cost than the serial interface). I have used the ip ospf
> >demand-circuit command at both sides of the ISDN line, but the OSPF
> >multicast traffic is still bringing up the line constantly. Any ideas
> >of why this would be?
> >
> >
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