OSPF - Things to Remember

Few things to remember about OSPF

- Always match Network Type
- Timers wont matter if interface types are different
- Broadcast and Non Broadcast always try to elect DR/BDR
- Always use Broadcast statement when using Frame-Relay Maps.

Things about Network Types

- If you cant change the network type use NEIGHBOUR command
-Configure all OSPF frame relay interfaces for Point to Multipoint.

Types of Network Types

-Broadcast -- DR election takes place -- Timer 10/40
-Non-Broadcast - DR election takes place-- Timer 30/120
-Point to Point - NO DR-- Timer 10/40
-Point to Multipoint - NO DR - Timer 30/120
-Point to Multipoint Non Broadcast - NO DR timer 30/120

Where to use OSPF Neighbour Command

- Neighbour Command is used to Signify where a Peer is when it cant be reached via multicast.
-Only necessary on one side of connection
-Hub site will configure the neighbour command