The value of this object identifies the mode of negotiating the setup of a neighbor relationship on P2P interfaces:
none(0): indicates that the negotiation mode used to establish a neighbor relationship is not specified.
twoWay(1): indicates that a neighbor relationship is set up through negotiations in two-way handshake mode.
threeWay(2): indicates that a neighbor relationship is set up through negotiations in three-way handshake mode.
threeWayOnly(3): indicates that a neighbor relationship is set up through negotiations in three-way handshake mode and the backward compatibility is not supported.
By default, a neighbor relationship is set up through negotiations in three-way handshake mode.