From: Maljure, Sanjay (smaljure@xxxxxxxxxxxxxxxxx)
Date: Sun Sep 17 2000 - 22:02:52 GMT-3
Hi
Ok It is the timeless question of "how to keep the ISDN line down in lab 8?"
This is what Marc Russels web site has to say...
Quote
Question: I can't keep the ISDN lines quiet with the OSPF demand-circuit
setup. What am I doing wrong here?
Answer: You probably have a problem at one or two points of redistribution.
On R5 that is mutually redistributing IGRP and OSPF are you filtering IGRP
into
OSPF such that it doesn't contain the subnet on the bouncing ISDN link? The
same issue may apply to R6 if you are using redistribute connected.
Unquote
Now I do NOT have elaborate access-lists (while redistributing into OSPF) on
R5 to accept only required subnets from R4 via IGRP.
I have debug IGRP running and I see that the IGRP update coming in from R4
has only 1 route which is the ethernet of R4. This makes sense to me because
I have split-horizon enabled on R4.
So why is my line still flapping all the time??? I infact do not understand
why we would need the "no peer neighbor-route" command.
I put in the "no peer neighbor-route" on R5 and R6 and this keeps the line
down but only when the Ethernet connecting R5 and R6 is up.
When I disconnect R5 and R6's ethernet connection, even the "no peer
neighbor-route" doesn't help to keep the line down...
I think the nation deserves an explanation ;-)
Please help
Sanjay
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