From: Warren J Dubose (wdubose@xxxxxxxxx)
Date: Wed Apr 03 2002 - 19:13:50 GMT-3
Guy,
MAS is correct.
How can r1 belong to 2 areas when it is connected to r1 talking IGRP?
There are two types of summarization in ospf:
Intra-area route summarization
---- summarization can occur at two points in an OSPF network at
"AREA BORDERS", where ABRs can be configured to announce a single Summary
LSA for the range of networks residing within a "specific area"
Inter-routing Domain Route Summarization
--- on ASBRs at "route redistribution points" where ospf routes are being
exported to another routing protocol, or non-ospf routes are being
imported into opsf.
Check out Doyle's or Caslow's book pertaining to summarization of OSPF.
This should help ;)
Regards,
Warren
On Wed, 3 Apr 2002, Lupi, Guy wrote:
> Right, that is what I did, R1 is a member of 2 areas, area 1 and area 0.
> Here is a partial output of "show ip ospf". This is why I don't understand
> why it isn't working. I thought that as long as the router was an ABR, you
> could use area range to summarize and inject into IGRP.
>
> r1#sh ip os
> Routing Process "ospf 100" with ID 141.63.10.1 and Domain ID 0.0.0.100
> Supports only single TOS(TOS0) routes
> Supports opaque LSA
> It is an area border and autonomous system boundary router
>
> -----Original Message-----
> From: Mas Kato [mailto:loomis_towcar@speedracer.com]
> Sent: Wednesday, April 03, 2002 4:30 PM
> To: Lupi, Guy
> Cc: ccielab@groupstudy.com
> Subject: RE: OSPF to IGRP redistribution (I know this has been killed,
> this is short I promise)
>
>
> Guy,
>
> Although router1 is certainly an ASBR, it really doesn't become an ABR until
> it becomes a member of two or more OSPF areas. If you hung another
> OSPF-speaking router off of router1 and placed it in an area different from
> router5, you would then see the results of your 'area range' command on that
> new router, because that new router would know how to read the type 3
> summary LSAs being originated by router1.
>
> Regards,
>
> Mas Kato
> https://ecardfile.com/id/mkato
>
> > "Lupi, Guy" <Guy.Lupi@eurekaggn.com> "'ccielab@groupstudy.com'"
> <ccielab@groupstudy.com>Date: Wed, 3 Apr 2002 14:44:12 -0500
> >Reply-To: "Lupi, Guy" <Guy.Lupi@eurekaggn.com>
> >
> >I know this has been covered in detail before, I just want to verify
> >something. I have the following:
> >
> >router2---------router1--------router5
> >
> >Router 5 and router 1 are OSPF, router 2 and router 1 is igrp only. I know
> >how to use the secondary address, tunnel, and route-map methods. I know
> how
> >to use summary address on router 1 to get connected routes that are not in
> >OSPF onto router 2. I cannot get routes from router 5 to router 2 using
> >area range on router 1. Router 1 is an ASBR, and an ABR. I cannot use the
> >area range command to get the route from r5 to r2, and summary address
> would
> >never work, but tunnels, route-maps, and secondary addresses work. I
> >thought that if the router was an ABR, you could do "area-range [area route
> >is from] x.x.x.x x.x.x.x". Thanks.
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