From: MAZHAR KARAGULLE (mkaragulle@xxxxxxxxxxxxxxxxxx)
Date: Wed Oct 04 2000 - 05:14:57 GMT-3
Hi,
To run your configuration correctly , In R4's routing table there should
be more specific routes to OSPF domain.In addition to that you can also
send a default to R4 .To make this requrement you should use on ABRs the
command of "are range x.x.x.x x.x.x.x " and on ASBR's "summary-address
x.x.x.x x.x.x.x " so that IGRP can send routing updates to R2. In this way
you can reach the networks on OSPF domain from R2 because R2 has now more
specific routes to OSPF domain.
As you inject default route to R2 you cann't use 170.100.0.0 because there
is more specific network between R4 and R2. To do this work you should use
another network which is redistributed for example into OSPF domain from
another routing domain.
I hope this will help you.
God luck.
Gönderilen:
Bilgisine:
"radha rani" Konu:
<radhaccie@hotmail.com> Fwd: Re: Redistributing OSPF to IGRP
(slightly different query)
Gönderen:
03/10/2000 06:59 PM
Lütfen "radha rani"
adresine yanıtlayınız.
Hi. I have a slightly different question regarding ospf-igrp
redistribution. I apologize if this has been answered already. I
didn't quite find it in the archives.
As I understand it, in order to get to variably subnetted networks in
the OSPF domain, we need to inject a default network into the IGRP
domain. The default network needs to be a network address other than
the classful address being used on the link between the two domains.
Another option would be to use a staitc route on the IGRP router.(I
hope I'm right so far - is there another method??)
I am working on a scenario where the instructions tell me to use **only
the 170.100.x.x class-b network everywhere** and I can't use any static
routes. In this case, how can I establish reachability from the IGRP
domain to various (variably subnetted) networks outside this domain?
Now I have a second question related to BGP: (it ties in with the
situation above, that's why I'm asking here)
OSPF net ------ R4 ------igrp------ R2--------ebgp-------R8
Lets say I went ahead and configured a different class-b net on R4 and
injected a default-network into R2. R2 can now successfully ping
170.100.8.2/27.
My next challenge is to advertise a supernet 170.0.0.0 from R2 to R8.
I do this with an aggregate-address on R2. This creates a static route
to null0 in R2's routing table (as expected). The problem is - now I
can't ping the address 170.100.8.2/27 from R2 because the packet is
being routed to the null interface on R2. Having a gateway of last
resort is useless as the 170.0.0.0 route is in the routing table. How
can R2 ping the variably subnetted addresses in the OSPF domain?
I appreciate any help you guys can provide. Thanks in advance.
-Radha
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