Allied Telesis AT-GS950/24 - Manual (Page 160)

Chapter 11: LACP Port Trunks
160
Two conditions must be met for a port in an aggregate trunk to function in
the standby mode. First, the number of ports in the trunk must exceed the
highest allowed number of active ports and, second, the port must be
receiving LACPDU packets from the other device. A port functioning in the
standby mode does not forward network traffic. However, it continues to
send LACPDU packets. If a port that is part of an aggregator does not
receive LACPDU packets, it functions as a normal Ethernet port and
forwards network packets along with LACPDU packets.
Note
You can adjust the value of a port’s priority.