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Forums » CCIE Forums » CCIE Routing & Switching Technical » OSPF Inter-Area Summarization and Advertisements
Latest post 12-28-2008 8:12 PM by yandyr. 1 replies.
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  • 12-27-2008 12:34 PM

    OSPF Inter-Area Summarization and Advertisements

    Reply Contact

    Team,

    I have one ABR between Area 0 and a standard Area 1, and I would like to summarize Area 1 addresses as they are passed into Area 0 on that ABR.

    There is a particular prefix in Area 1 that is part of the summarized range, but I would like to advertise this particular more-specific prefix into Area 0 so that devices in Area 0 have both the summary address and this more-specific prefix in their routing tables.

    How could I accomplish this task?

    Thanks!
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    • Post Points: 20

  • 12-28-2008 8:12 PM In reply to

    • yandyr
    • Top 150 Contributor
    • Joined on 12-08-2008
    • Miami
    • Posts 25
    • Points 365

    Re: OSPF Inter-Area Summarization and Advertisements

    Reply Contact

    well are there any specific requirements? like this needs to be internal OSPF? can it be external ospf? since summarization can only happen at ABRs and ASBRs that can give you a possible solution. And there are two separate commands to summarise Internal OSPF and External OSPF. I don't want to give you the entire solution, but that most specifc prefix could be redistributed into OSPF rather than brought into OSPF with a  network command or a ip ospf 1 area x under the interface. Think about it and let us know.

    ----------------------------------------------------
    Yandy
    Sr. Network Engineer
    ----------------------------------------------------
    blog: http://www.cciepath.com
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    • Post Points: 5
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