6-7
Stack Management for the 3500, 3500yl, 6200yl and 6600 Switches
Configuring Stack Management
Note In the default stack configuration, the Candidate Auto Join parameter is 
enabled, but the Commander Auto Grab parameter is disabled. This prevents 
Candidates from automatically joining a stack prematurely or joining the 
wrong stack (if more than one stack Commander is configured in a subnet or 
broadcast domain). If you plan to install more than one stack in a subnet, HP 
recommends that you leave Auto Grab disabled on all Commander switches 
and manually add Members to their stacks. Similarly, if you plan to install a 
stack in a subnet (broadcast domain) where stacking-capable switches are 
not intended for stack membership, you should set the Stack State parameter 
(in the Stack Configuration screen) to Disabled on those particular switches. 
Configuring Stack Management
Overview of Configuring and Bringing Up a Stack
This process assumes that:
■ All switches you want to include in a stack are connected to the same 
subnet (broadcast domain).
■  If VLANs are enabled on the switches you want to include in the stack, 
then the ports linking the stacked switches must be on the primary 
VLAN in each switch (which, in the default configuration, is the 
default VLAN). If the primary VLAN is tagged, then each switch in the 
stack must use the same VLAN ID (VID) for the primary VLAN. (Refer 
to “The Primary VLAN” on page 1-49, and “Stacking Operation with 
Multiple VLANs Configured” on page 6-43.)
■ If you are including a HP Switch 8000M, 4000M, 2424M, 2400M, 
or 1600M in a stack, you must first update all such devices to 
software version C.08.03 or later. (You can get a copy of the latest 
software version from the HP Networking web site and/or copy it 
from one switch to another. For downloading instructions, see 
appendix A, “File Transfers”, in the Management and Configuration 
Guide for your switch.)