ProSafe 7000 Managed Switch Software Administration Manual, Release 8.0.3
Managing Switch Stacks
17-5
v1.0, June 2010
2.
The switch with the highest stack member priority value
3.
The switch with the higher MAC address
A stack master retains its role unless one of these events occurs:
•
The stack master is removed from the switch stack
•
The stack master is reset or powered off
•
The stack master has failed
•
The switch stack membership is increased by adding powered-on standalone switches or switch stacks
In the case of a master re-election, the new stack master becomes available after a few seconds. In the
meantime, the switch stack uses the forwarding tables in memory to minimize network disruption. The
physical interfaces on the other available stack members are not affected while a new stack master is elected.
If a new stack master is elected and the previous stack master becomes available, the previous stack master
does not resume its role as stack master.
Stack Member Numbers
A stack member number (1 to 8) identifies each member in the switch stack. The member number also
determines the interface-level configuration that a stack member uses. You can display the stack member
number by using the
show switch
user EXEC command.
A new, out-of-the-box switch (one that has not joined a switch stack or has not been manually assigned a
stack member number) ships with a default stack member number of 1. When it joins a switch stack, its
default stack member number changes to the lowest available member number in the stack.
Stack members in the same switch stack cannot have the same stack member number. Every stack member,
including a standalone switch, retains its member number until you manually change the number or unless
the number is already being used by another member in the stack.
See
“Renumber Stack Members”
and
“Merging Two Operational Stacks”
.
Stack Member Priority Values
A stack member priority can be changed if the user would like change who is the master of the stack. Use the
following command to change stack member's priority (this command is in the global config mode):
switch
unit
priority
value
Note:
NETGEAR recommends assigning the highest priority value to the switch that
you prefer to be the stack master. This ensures that the switch is
re-elected as stack master if a re-election occurs.
