RE: ospf demand-circuit and interesting traffic

From: Brian Dennis (bdennis@internetworkexpert.com)
Date: Tue May 31 2005 - 13:26:53 GMT-3


Tim,
        That is incorrect. A demand circuit does two things:

1) Suppressed Periodic Hellos
2) Suppressed Periodic LSA Refresh

        In order for OSPF to trigger and/or maintain a call, you will
need to have configured OSPF to be considered interesting traffic.

Brian Dennis, CCIE #2210 (R&S/ISP-Dial/Security)
bdennis@internetworkexpert.com

Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987
Direct: 775-745-6404 (Outside the US and Canada)

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
ccie2be
Sent: Tuesday, May 31, 2005 9:00 AM
To: 'Roy Dempsey'; 'Cisco certification'
Subject: RE: ospf demand-circuit and interesting traffic

Roy,

Not a dumb question at all !!!

I'm pretty sure the demand circuit will bring up the link regardless of
what's in the dialer-list but I'm not 100% sure.

One way to check is this: configure your dialer-list to deny all and
then
change the ospf topology.

Whatever happens, you'll have your answer.

HTH, Tim

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Roy
Dempsey
Sent: Tuesday, May 31, 2005 10:55 AM
To: Cisco certification
Subject: ospf demand-circuit and interesting traffic

Probably a dumb question, but if you configure an ISDN link as an OSPF
demand-circuit, does this bring up the ciruit regardless of whats in
the dialer-list. Or should you include it in the dialer-list also.

I didn't think it needed to be specified, but I'm not sure, and can't
check
it.

--
Regards,
Roy


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