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OSPF over NBMA questions

(1) Why is there a "neighbor priority" setting associated with "ip ospf network ptmp non-broadcast"? I thought no DR/BDR elections took place on PTMP?

(2) Why does doc CD(under OSPF commands - "IP OSPF NETWORK") say broadcast and Non-broadcast require full mesh? I thought either could be partial as long as you make the hub DR?

(3) Is there a current document that describes exactly what happens on OSPF over NBMA(ie: down to the layer 2 and 3 addresses on each packet for each scenario)? I'm getting too much conflicting information. Thanks.

1 REPLY
Anonymous
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Re: OSPF over NBMA questions

1. You are right. But the doc just asks you to use "neighbor" to identify neighbors, not priority for DR selection.

2. I think you've misunderstood. Pls re-read the passage.

3. Although I think searching RFC for these info is not that hard, I highly recommend you set up a testing environment with a few routers and observe what's really happening. That will surely clarify your confusion.

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