HP ProCurve 5300xl Series Management Manual page 631

The Commander appears in the stack as Switch
Number (SN) 0.
Figure 13-26. Example of the Commander's Show Stack Screen with Only the Commander
Discovered
Using a Member's CLI to Convert the Member to the Commander of a
New Stack. This procedure requires that you first remove the Member from
its current stack, then create the new stack. If you do not know the MAC
address for the Commander of the current stack, use show stack to list it.
Syntax: no stack
Suppose, for example, that an HP switch named "Bering Sea" is a Member of
a stack named "Big_Waters". To use the switch's CLI to convert it from a stack
Member to the Commander of a new stack named "Lakes", you would use the
following commands:
Stack Management for the Series 3400cl and 6400cl Switches
stack commander < stack name >
Configuring Stack Management
The stack commander command
configures the Commander and names
the stack.
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