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

jac
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