Hitachi Compute Blade 2000, User Manual

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LFT port selection
LFT applies to ports MGMT0 and MGMT1. LFT can be independently enabled or
disabled on these two ports. Because they are failed over independently of each
other, if each port is connected to a different switch, a failover occurring on the
network between one of the ports and its associated switch will affect only that port.
In the factory settings, LFT is enabled on both MGMT0 and MGMT1. You can
change this setting from the management module's serial console or from the
system Web console. For the procedure, see "Command List" or "List of System
Web Console Features" in Chapter 6.
LFT trigger events
When the system detects that the link to the active management module’s port
MGMT0 or MGMT1 has gone down, the link is switched by the LFT feature. The link
may be switched for the following reasons:
Trigger event Remarks
Broken or loose cable between the port
and associated switch
Hardware fault on the associated switch Only if the link is deemed broken by the
management module.
In initial state, when the link to an LFT-enabled port on the active management
module is detected as being down for three seconds continuously, the link is
switched to the other port. You can change the number of seconds before link
switching begins, using the management module's serial console or the system Web
console. The specifiable range is 1 to 3600 seconds. For the procedure, see
"Command List" or "List of System Web Console Features" in Chapter 6.
LFT recovery
In initial state, when the link to an LFT-enabled port on the active management
module is detected as being up for 180 seconds continuously, the link to that port is
restored. You can change the number of seconds before link recovery begins, using
the management module's serial console or the system Web console. The
specifiable range is 1 to 3600 seconds. For the procedure, see "Command List" or
"List of System Web Console Features" in Chapter 6.
The management module monitors the link status at 1-
second intervals. Therefore, the time until link switching or
recovery is initiated is the specified value plus 1 second.
Further allowance must be made for the processing time
until switching is completed.