•
The switch with the higher MAC address.
A stack manager retains its role unless one of these events occurs:
•
The stack manager is removed from the switch stack.
•
The stack manager is reset or powered off.
•
The stack manager has failed.
•
The switch stack membership is increased by adding powered-on standalone switches or switch
stacks.
In the case of a manager re-election, the new stack manager becomes available after a few seconds.
If a new stack manager is elected and the previous stack manager becomes available, the previous
stack manager does not resume its role as stack manager.
Stack Member Numbers
A stack member number (1 to n) 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
Privileged 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
Merging Two Operational Stacks
Stack Member Priority Values
You can set the stack member’s priority in the range 0 to 15.
Note
Setting the switch priority to 0 (zero) makes it ineligible for manager selection.
Switch Stack Software Compatibility Recommendations
All stack members must run the same 200 Series software version to ensure compatibility between
stack members. The software versions on all stack members, including the stack manager, must be the
same. This helps ensure full compatibility in the stack protocol version among the stack members.
If a stack member is running a software version that is not the same as the stack manager, then the
stack member joins the stack but stays in code incompatible status (the stack unit is not allowed to join
the stack as a fully functional member). Use the
show switch
command to list the stack members
and the software versions. The new unit will be visible. The administrator can load the code to that new
unit and reset the unit. The ports on the unit in software mismatch state do not come up.
Getting Started with Stacking
ExtremeSwitching 200 Series: Administration Guide
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