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.

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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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