How many hello packets get exchanged between routers in ospf to go from DOWN state to 2-way state? ONLY From Down to 2-way. It will be very helpful if you could explain full procedure packet by packet from down state?

Take any two routers connected by FastEthernet 0/0 and ?

1 Answer 1



Router A sends a hello to router B.   Router B lists A as Init
Router B sends a hello to A, listing A as its neighbor.  Router A lists B as 2-way
Router A sends a hello to B listing B as its neighbor.  Router B lists A as 2-way
  • Listing A and B as each other neighbor;okk; In which filed of hello packet does these neighbor located i.e. field in hello packet where B list A as its neighbor and vice versa. Jul 13, 2015 at 5:21
  • Ten seconds with Google will give you that answer.
    – Ron Trunk
    Jul 13, 2015 at 20:49

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.