Allied Telesis AT-S63 - Manual (Page 76)

Chapter 2: AT-9400Ts Stacks
76 Section I: Basic Operations
 If the switch determines that its ID number is set to STATIC with the
value 1, then it knows that it’s the master switch of the stack and that it
is responsible for maintaining the STACK.CFG file for the entire stack.
 If the switch determines that its ID number is set to STATIC with a
value of 2 or more, then it knows that it is part of a stack and that it
should receive its configure settings from the master switch.
 If the switch’s ID number is set to STATIC but the device is not a part
of a stack, the switch still uses the STACK.CFG file to set its
parameter settings. If the switch does not have this file, it uses the
default values for its parameter settings.
By having two standard configuration files, a switch can retain its prior
configuration settings when converted from a stand-alone configuration to
a stack member, or vice versa. This saves you the trouble of having to
reconfigure the device.
Since there are two different configuration files, the parameter settings
from a stand-alone configuration file cannot be automatically transferred to
a stack configuration file. For a switch to have the same settings in a stack
that it had as a stand-alone device, you must reapply the settings after
adding the switch to the stack.