Allied Telesis AlliedWare Plus GS980MX Series Installation Manual page 86

Chapter 2: Virtual Chassis Stacking
86
Table 19. Stacking Worksheet Columns (Continued)
Column
Priority
AW+ Version
Number
Trunk Ports
Description
When the switches of a stack are reset or
powered on, they perform an initialization process
that involves, in part, choosing the master switch.
The selection is based on their priority numbers
and MAC addresses. The former is an adjustable
parameter with a range of 0 to 255 and a default
value of 128. The lower the value, the higher the
priority. Thus, the switch with the lowest value
becomes the stack master.
If switches have the same priority number, the
master is selected based on their MAC
addresses. Again, as with priority numbers, the
lower the MAC address, the higher the priority.
Allied Telesis recommends setting each switch's
priority value to match its ID value. This is to
ensure that the switch you have chosen to be the
master unit will indeed function in that role.
Additionally, it will make it possible for you to
know the order in which the switches assume the
master role if the primary master should fail or be
powered off.
This column is for writing down the version
numbers of the AlliedWare Plus management
software on the switches. The switches might not
be able to form the stack if they have different
versions. The configuration instructions explain
how to view the version numbers. If they have
different versions, you should update them to the
most recent release before building the stack.
This column is for the ports of the trunk. This will
be the default ports or the optional trunk ports.
Refer to Table 17 on page 63. If you have not
chosen the ports yet, you should do so before
beginning the configuration procedures.