Allied Telesis AT-2972T/2 - Manual (Page 108)

Key Protocols and Interfaces
108
Failover Teaming
Failover Teaming provides redundant adapter operation in the event that a
network connection fails. When multiple Allied Telesis Gigabit Ethernet
adapters are installed in the same server, they can be paired into Teams.
Each team must have at least one adapter, but can support up to eight
adapters. The number of teams is limited by the number of adapters that
are installed.
If the primary adapter in a team is disconnected because of failure of the
adapter, cable, or switch port, the secondary team member becomes
active, redirecting both inbound and outbound traffic originally assigned to
the primary adapter. Sessions will be maintained, causing no impact to the
user.
Note
Allied Telesis recommends disabling STP when using the teaming
and fault tolerance features.
Note
Failover Teaming is available with the Broadcom Advanced Control
Suite 2 (BACS 2) utility which is available on the CD.