OSPF neighbors
| Side A | Side B | Works | Requires to work |
|---|
| P2P | P2P | yes | nothing |
| P2M | P2M | yes | nothing |
| Broadcast | Broadcast | yes | nothing |
| Non-broadcast | non-BC | yes | neighbor command |
| Broadcast | non-BC | yes | adjust hello and/or dead timers |
| P2P | P2M | yes | adjust hello and/or dead timers |
| P2P | non-BC | no |
| P2M | non-BC | no |
| P2P | BC | no |
| P2M | BC | no |
- Possible issues with DR election with broadcast and non-broadcast network types in a hub and spoke environment. Set the spokes to have an OSPF priority of "0"
- If using P2P in a hub and spoke environment, the hub will have to be P2M if there is more than one neighbor off the hub's interface. P2P and P2M will neighbor as long as the hello and dead timers match.
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