The reason for the E-Trunk being in the current status.
pri(1):Priority calculation.
timeout(2):The receiving timer timed out.
bfdDown(3):BFD detected the control link between the PE and peer down.
peerTimeout(4):The receiving timer of the peer timed out.
peerBfdDown(5):BFD of the peer detected the control link between the PE and peer down.
allMemberDown(6):All members of the E-Trunk were down.
init(7):Initiated the E-Trunk.
peerNodeDown(8):The peer node is down.