I was wonder if someone could clarify this for me, I am a little confused. My understanding is that the Master controls the synchronization and that the slave only sends DD packets in response to DD packets from the master w/ the sequence number the master set in the dd packet. It seems like R1(master) says "I got A", "did you get A" R2(slave) responds "yeah I got A" When does R2 tell R1 "I also got B", I am assuming it is during the his DD response of "yeah I got A". How does R1 react in this master/slave scenario? I am also assuming that he is making an LSA request to the slave during the DD exchange. I have also assumed that neighbor with the lowest Router ID becomes the slave, is a correct assumption. In an OSPF network where you have DR (and may be a BDR) what happens if neither of these is chosen to be the Master. If all of these assumptions are correct, in the above scenario can you ever have a situation where R1 says "that all folks", while R2 still has something to say. (the master is not sending any more DD packets for the slave to respond to.) Would this lead to false neighbor state of full? _________________________________ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]