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Forum Replies

  1. Rohan,
    Yes. The only way to get networks into OSPF is either to redistribute them (from locally connections or from another routing protocol), or to explicitly add them to OSPF via a “network” statement. Since using the network state would not result in the routes being seen as external (the purpose of the exercise), there is no other option than redistribution of some form.

  2. Hello Sims,

    I tried a different example from the one which are shown in the lesson, just to make sure that I understand OSPF summarization well enough. But unfortunately, I couldn’t make it work. Can you please review and let me know what’s done wrong? Thank you for your support.

    R1-R3-R5 (Area 1)
    R1-R2 (Area 0 - Gbps link* and reference bandwidth has been adapted to all routers to 1000)
    R2-R4-R6 (Area 2 - but it’s not configured / used in this example)

    R1 f1/0 and g0/0 interfaces have “ip ospf priority 2” to make the R1 the DR for all the segments.
    R3 router-i

    ... Continue reading in our forum

  3. Hi @tsirgogik

    Which area range command did you use? On R1, this should work:

    router ospf 1
    area 0 range

    You can make your summary a bit more specific btw, will cover -


  4. hello lagapides

    thanks for your feedback ,your clearfication is helpfull

  5. The problem here is, he is trying to summarize area 1 but using area 0 in summarization command. Instead of area 0 range , you should use area 1 range

    router ospf 1
    area 1 range

    Also the summary address (R3 loopbacks) won’t cover all loopbacks in R3.


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