HP ProCurve series 2500 Management And Configuration Manual page 208

Configuring Advanced Features
HP ProCurve Stack Management
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For automatically or manually pulling Candidate switches into a stack,
you can leave such switches in their default stacking configuration. If you
need to access Candidate switches through your network before they
join the stack, assign IP addresses to these devices. Otherwise, IP
addressing is optional for Candidates and Members. (Note that once a
Candidate becomes a member, you can access it through the Commander
to assign IP addressing or make other configuration changes.)
Make a record of any Manager passwords assigned to the switches
(intended for your stack) that are not currently members. (You will have
to use these passwords to enable the protected switches to join the
stack.)
If you are using VLANs in the stacking environment, you must use the
default VLAN for stacking links. For more information, see "Stacking
Operation with a Tagged VLAN" on page 9-47.
Ensure that all switches intended for the stack are connected to the same
subnet (broadcast domain). As soon as you connect the Commander, it
will begin discovering the available Candidates in the subnet.
• If you configured the Commander to automatically add Members
( Auto Grab set to Yes ), then the first 15 discovered Candidates
meeting both of the following criteria will automatically become
stack Members:
– Auto Join parameter set to Yes (the default)
– Manager password not configured
• If you configured the Commander to manually add Members (
Grab set to No —the default), you can begin the process of selecting
and adding the desired Candidates.
Ensure that all switches intended for the stack have joined.
If you need to perform specific configuration or monitoring tasks on a
Member, use the console interface on the Commander to select and
access the Member.
Auto