From: ccie2be (ccie2be@nyc.rr.com)
Date: Fri Jul 04 2003 - 07:22:15 GMT-3
Hi,
After checking the archieves, I didn't find anything that specifically
addressed this question, so here goes.
I thought that when a BRI interface is configured as an ip ospf
demand-circuit, it will automatically suppress ospf hello's as long as the
interface is configured as a p2p or p2m ospf network type.
However, in the example at
http://www.cisco.com/warp/public/129/config-bri-map.html , it shows an access
list being used to prevent ospf hello's in addition to the ip ospf
demand-circuit command being configured.
Is it really necessary (or just sometimes necessary) to use an access list to
deny ospf hello's (packets addressed to 224.0.0.5) when one side of the isdn
circuit is configured as an ip ospf demand circuit? If so, why is that?
Also, if the access-list in addtion to the ip ospf demand circuit is only
needed in certain situations, what are those situations?
Thanks, Jim
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