Packets between OSPF 2 way neighbors

CheesyBreadCheesyBread Member Posts: 99 ■■□□□□□□□□
in CCNP
Do 2 OSPF routers showing a 2 way relationship exchange any kind of information on a regular basis?
· Share on FacebookShare on Twitter

Comments

  • wavewave Member Posts: 342
    I'm pretty sure it's just Hellos in a stable 2-way state.
    ROUTE Passed 1 May 2012
    SWITCH Passed 25 September 2012
    TSHOOT Passed 23 October 2012
    Taking CCNA Security in April 2013 then studying for the CISSP
    · Share on FacebookShare on Twitter
  • wavewave Member Posts: 342
    OSPF Adjacencies <-- Not 100% definitive but you could run some debugs to see exactly what happens.

    Seeing as there are only these packet types (below) which are associated with states after the 2-way state, if a router never passes the 2-way state (because there is already a DR/BDR) then it should never exchange them:

    Hello - Used to establish communication with directly connected neighbors
    Database Descriptor (DBD) - Lists router IDs from which the router has an LSA and its current sequence number
    Link State Request (LSR) - Request for an LSA
    Link State Update (LSU) - Reply to an LSR with the requested information
    Link State Acknowledgment (LSAck) - Used to confirm receipt of link-state information
    ROUTE Passed 1 May 2012
    SWITCH Passed 25 September 2012
    TSHOOT Passed 23 October 2012
    Taking CCNA Security in April 2013 then studying for the CISSP
    · Share on FacebookShare on Twitter
Sign In or Register to comment.