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SFT
Switch Fault Tolerance (SFT) is a redundant function with a configuration in which each LAN card is
connected to a different switch. Spanning tree function on the switch is enabled, so that the switch
can be used in the redundant configuration. When an error occurs (*) between the LAN card and its
connected switch, the path to use is switched. However, errors between switches (arrows in the
following figure) cannot be detected. For such errors, it is necessary that the switch spanning tree
function is activated (enabled).
* : Link disruption between the LAN card and switch, and equivalent errors are the only errors that
can be detected. Therefore, when a switch is partly faulty but the port connected to the card is
normal in the link level, usually the path will not be switched.
Note
The notes on using the teaming function are as follows:
For more details, refer to [Help] in Intel
®
PROSet.
• The teaming function is available only for Windows (SP2 or later required).
• Once a Team is created, a virtual adapter (example: Intel(R) Advanced Network Services Virtual
Adapter) is created on OS. Upper protocols are bound with the virtual adapter, not with each phys-
ical adapter composing the team.
• Do not use the high-speed teaming function.
• When ALB is being used, you cannot use Windows Load Balancing Service (WLBS) or Network
Load Balancing (NLB).
• Up to four LAN ports are available for each AFT/ALB team configuration.
• In the same system, a maximum of two teams can be configured. Note that the number of available
LAN ports is limited depending on each system.
• Up to two LAN ports are available for each SFT team configuration. In the same system, a maxi-
mum of two teams can be configured.
• Ethernet controllers in a team must be on the same network (broadcast domain). The IP address is
shared.
• Only the following protocols are available for the teaming function.
- AFT/SFT: IP, NetBEUI, IPX (NCP), IPX (NetBIOS)
- ALB: IP, IPX (NCP)
Switch1
Secondary link
PRIMERGY Server
Primary link
Ethernet controller
Ethernet controller