What are two OSPF attributes within the hello messages that must match to successfully establish neighbor relationships? (Choose two.)
What are two OSPF attributes within the hello messages that must match to successfully establish neighbor relationships? (Choose two.)
To establish OSPF neighbor relationships, certain parameters in the hello messages must align between routers. The Hello and Dead intervals, which define the time intervals for sending hello packets and detecting failures, must match to ensure synchronized communication. Additionally, the Area ID must be the same, as only routers within the same area can establish neighbor relationships. These matching attributes are crucial for maintaining consistent OSPF neighbor relationships.
A is also a correction choice alongside C and D. but you can only choose 2 options
RouterIDs must be different
You are right, the only parameters that must match are the rouetr area and the hello intervals. the rest of the parameters must be unique in each switch.
C, D is correct because " must match to successfully establish neighbor relationships" are the only ones, the answer A is not correct although certainly the RouterIDs must be different too.
Two OSPF routers with the same router-id WILL NEVER become neighbors. OSPF router-id is specific to that router and usually configured as a Lo interface
OSPF Adjacency Requirements, The devices must be in the same area. The devices must have the same authentication configuration. The devices must be on the same subnet. The devices hello and dead intervals must match. The devices must have matching stub flags.
C D correct
C & D are correct