Instruction Manual
18
ANS Teaming Types
Adapter Fault Tolerance (AFT)
- provides automatic redundancy for a server's
network connection. If the primary adapter fails, the secondary adapter takes over.
During normal operation, the backup adapters are in standby. Adapter Fault Tolerance
supports two to eight adapters per team. This teaming type works with any hub
or switch. During normal operation, the backup adapters are in standby. All team
members must be connected to the same subnet.
Switch Fault Tolerance (SFT)
- provides failover between two adapters connected to
separate switches. Switch Fault Tolerance supports two adapters per team. Spanning
Tree Protocol (STP) must be enabled on the switch when you create a SFT team.
During normal operation, the secondary adapter is in standby. When SFT teams are
created, the Activation Delay is automatically set to 60 seconds. This teaming type
works with any switch or hub. All team members must be connected to the same
subnet. In SFT teams, each adapter in the team can operate at a different speed than
the other.
• You can set up monitoring between an SFT team and up to five IP addresses. This
allows you to detect link failure beyond the switch. You can ensure connection
availability for several clients that you consider critical. If the connection between
the primary adapter and all of the monitored IP addresses is lost, the team will
failover to the secondary adapter.
• Switch Fault Tolerance can detect failures when they occur on either teamed
adapter, on either cable connecting the teamed adapter to its switch, or on switch
ports connected to the adapters, if link is lost
Adaptive Load Balancing (ALB)
- uses software to balance routable traffic among
a team of two to eight adapters or LOMs (the team must include at least one server
adapter) connected to the same subnet. The software analyzes the send and transmit
loading on each adapter and balances the rate across the adapters based on
destination address. Adapter teams configured for ALB also provide the benefits of
fault tolerance.
NOTES:
• ALB does not load balance non-routed protocols such as NetBEUI and some IPX*
traffic.
• You can create an ALB team with mixed speed adapters. The load is balanced
according to the lowest common denominator of adapter capabilities and the
bandwidth of the channel.
