From: Chuck Church (cchurch@xxxxxxxxxxxx)
Date: Mon Jan 08 2001 - 11:18:43 GMT-3
Chuck,
I think the key is only having 1 redistribution point. With only 1,
holddown timers and the (hopefully) higher metric of the foreign domain
should stop most loops. A common cause of loops is when a route is lost in
domain x, with 2 routers doing mutual RED. The lost route will appear to be
reachable from domain y as if it originated from y. That's where it loops.
To be on the safe side, I'd use distribute lists any time there more than
one RED router. Now, if I can only remember that this Friday and Saturday
in RTP...
Chuck Church
CCNP, CCDP, MCNE, MCSE
Sr. Network Engineer
Magnacom Technologies
140 N. Rt. 303
Valley Cottage, NY 10989
845-267-4000 x218
-----Original Message-----
From: Chuck Larrieu [mailto:chuck@cl.cncdsl.com]
Sent: Monday, January 08, 2001 12:26 AM
To: CCIE_Lab Groupstudy List
Subject: OSPF Redistribution question
I just complete a frenetic go-through of the Slattery/Burton book - chapter
5 - OSPF section
One section touches on redistribution between RIP 2 and OSPF ( although I
suppose that is not necessarily relevant )
In any case, setup was relatively simple:
OSPF domain------redistribution_router----------RIPv2 domain
Jus to see what happened, I failed to place the distribute-lists as
recommended. I wanted to see bad thing happen. For the life of my I could
net get a routing loop to form. I did things like lower the metric of the
redistributed routes to below that of the native OSPF routes, hoping to see
the RIP redistribution come into the routing tables of the OSPF routers. No
dice.
So my question - in a situation like the above, with only a single
redistribution point, does it matter? Was the issue the particular routing
protocols? Is the issue of redistribution and loops as a result relevant
only with multiple redistribution points?
Any thoughts as to why I couldn't cause problems when I tried, even though I
seem to have no trouble creating problems when I don't try?
Chuck
----------------------
I am Locutus, a CCIE Lab Proctor. Xx_Brain_dumps_xX are futile. Your life as
it has been is over ( if you hope to pass ) From this time forward, you will
study US!
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