OSPF Flashcards
1
Q
OSPF Multicast Address
A
- 0.5 for all routers
225. 0. 0.6 for DR/BDR
2
Q
Why would a OSPF router be stuck in exstart?
A
Most likely is MTU mismatch.
Either make the MTU match or configure “ip ospf mtu-ignore”
3
Q
What are the 8 OSPF neighbour states
A
Down -> Attempt (optional) -> Init -> 2-Way -> Exstart -> Exchange -> Loading -> Full.
4
Q
What OSPF Network Type doesn’t elect a DR/BDR
A
Point-to-Point
typically serial
5
Q
What are the 8 LSA types
A
LSA 1 - Router LSA 2 - Network LSA 3- Summary LSA 4 - Summary ASBR LSA 5 - AS External LSA LSA 6 - Multicast OSPF LSA - Not used / supported by Cisco LSA 7 - NSSA
