From: Fred Ingham (fningham@xxxxxxxxxxxxxxxx)
Date: Sun Mar 03 2002 - 18:27:50 GMT-3
This question is answered in the archives (many times). To give you a
start - when you redistribute OSPF into IGRP the routes you will see on
the IGRP router are classful routes, routes having the same mask as the
IGRP-OSPF connected network, and host routes.
If you can summarize OSPF routes (area range) to a classful network, or
a network having the same mask as the IGRP-OSPF connection, these will
appear in the IGRP routing table. Other routes won't. The
default-network command is used to provide a default gateway to IGRP for
connectivity but will not put additional networks in the table.
Hope this helps you to get started.
Fred.
Babacar Diop wrote:
>
> When you mutually redistribute between OSPF and IGRP,
> and do not see all the subnetted OSPF routes in a
> router running IGRP only, what do you do to get the
> routes in that router (running IGRP). Also, how does
> the mask configured on the router running IGRP have
> anything to do with the redistribution.
> I know two things, that help not loose connectivity:
>
> 1) Use the summary address in OSPF to summarize the
> routes you want to see in the router running IGRP.
> 2) Annonce an IP default-network on the redistributing
> router pointing to the IGRP domain.
>
> This has never worked for me and am i supposed to see
> these routes in the router running IGRP after i use
> one of the above command?
> How does the lenght of the mask in interfaces
> configured for IGRP come into play?
> I am very confused.
> Does anybody has an better explanation or maybe a
> document i can read to better understand this issue.
>
> Regards,
>
> BD
>
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