Common Routing Problem with OSPF Forwarding Address

From: Michael Snyder (msnyder@revolutioncomputer.com)
Date: Mon Feb 09 2004 - 22:07:49 GMT-3


http://www.cisco.com/en/US/tech/tk365/tk480/technologies_tech_note09186a
008009405a.shtml
Can you elaborate on this a little more:

"One more thing, there's a special case where in ospf where if you don't
passive a non-neighbored interface it will break the route. Save
yourself some trouble, if your ospf interface doesn't have a neighbor;
passive it and move on. I spend two hours once trying to figure that
one out."

I don't understand what you mean by "break the route".

Thanks,
Danny

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http://www.cisco.com/en/US/tech/tk365/tk480/technologies_tech_note09186a
008009405a.shtml

Common Routing Problem with OSPF Forwarding Address

Like I said, it's a special case.

OSPF is enabled on the ASBR's next hop interface AND
ASBR's next hop interface is non-passive under OSPF AND
ASBR's next hop interface is not point-to-point AND
ASBR's next hop interface is not point-to-multipoint AND
ASBR's next hop interface address falls under the network range
specified in the router ospf command.

The easy fix being to passive any interface that doesn't have a
neighbor.



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