Table 21: Stacking Worksheet Columns - Allied Telesis x530 Series Installation Manual

Chapter 2: Virtual Chassis Stacking
88
The worksheet columns are described in Table 21.
Table 21. Stacking Worksheet Columns
Column
Switch Model/
Location
ID
Priority
Description
Use this column to write down the model names
of the switches and their physical locations, such
as the buildings or equipment rooms. The
information can be useful in locating the switches
if they are in different locations.
Each switch in a stack has to have a unique ID
number. They display the numbers on the ID
LEDs on the front panels and you use the
numbers to configure the individual ports. Allied
Telesis recommends assigning the ID 1, the
default value, to the master switch. You should
decide ahead of time, before beginning the
configuration procedures, the ID assignments of
the switches.
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.