OSPF Notes – Network Types

Corrections are always welcome.

Broadcast : Think an Ethernet segement

DR/BDR? : Yes
Default hello interval : 10 sec
Neighbor config required? : No

Point-to-point : Physical point-to-point links, frame-relay point-to-point subifs

DR/BDR? : No
Default hello interval : 10 sec
Neighbor config required? : No

Nonbroadcast Multiaccess : Frame-relay multipoint or physical

DR/BDR? : Yes
Default hello interval : 30 sec
Neighbor config required? : Yes

Point-to-multipoint : Partial mesh networks like a frame-relay hub-and-spoke configuration

DR/BDR? : No
Default hello interval : 30 sec
Neighbor config required? : No

Point-to-multipoint nonbroadcast : Partial mesh networks like a frame-relay hub-and-spoke configuration but without the ability to broadcast
NOTE:  I’m  having trouble finding an example of this that doesn’t include changing routing preferences between two unequal paths.

DR/BDR? : No
Default hello interval : 30 sec
Neighbor config required? : Yes

Aaron Conaway

I shake my head around sometimes and see what falls out. That's what lands on these pages. If you have any questions, the best way to contact me is through Twitter at @aconaway.

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2 comments for “OSPF Notes – Network Types

  1. Thomas Whittle
    June 6, 2011 at 5:57 am

    Hey, loving the OSPF and EIGRP posts you are doing, I’m using them as knowledge tests to make sure I remember all the details.

    Only thing I’ve noticed is a spelling mistake in the point-to-point description:
    “frame-relate”

    Keep them coming they are really useful!
    Tom

  2. June 6, 2011 at 12:20 pm

    More on the way, Tom!

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