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ABR Summaries causing bad OSPF route paths

From: Erblichs (erblichsEARTHLINK.NET)
Date: Wed May 14 2003 - 14:14:44 CDT


Group,

        I ran into what I call sys admin error in specifiying
        ABR summaries. This is due to the fact that each summary
        only carries a single weight. These summaries are
        advertised outside of the area. However, a better/shorter
        path may be to one of the summarized subnets via a
        different ABR but that 2nd ABR has summarized the subnet
        with a higher weight.

        Should / are RFCs existing that handle the incorrect
        summarizing and/or the improper weighting of the summaries?

        Should OSPF have a intelligence that tries to identify
        the proper level of summaries and/ or the weighting of such?

        Yes, I do realize that summaries have benefits dealing with
        decreased route tables, fewer OSPF control packets, etc.

        Mitchell Erblich
        Sr Software Engineer