On IOS versions of that age, EIGRP summarization does not work properly.
A while back I researched this and found the Cisco bug report. I don't have
the information off hand, but it can be found on CCO.
You should upgrade to a more recent IOS if possible..
Chuck
""Andrew Larkins"" wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Hi all,
>
> I tried this yesterday and got some funny results.
> A client of ours uses another private company to do long haul connections
> to overseas sites. They (the private company) are redistributing their
OSPF
> routes into my EIGRP process. They have recently had some instability on
> some of their numerous routes, so I tried using summary addressing on the
> router that connects to my clients network. The summary was correct and
> actually showed correctly in the routing table on the upstream router.
>
> Problem:
>
> Even though the summarised route is in the table, the 100's of host routes
> are also there, all pointing to the same place. Now the users in the UK
> could not connect. I removed the summary addresses and all ok again - just
> the summarised route gone from the routing tables. This particular router
is
> using ver 11.1 ( really old!!)
>
> Now this summarisation works on all the other routers correctly. Any
idea's
>
> Andrew Larkins
> BCom, CCNP, CCDA
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