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Chapter 3: Connecting the Switch
Stack Troubleshooting and Maintenance
Linksys One Ready Communications Solution
Chapter
3
Neither the Stack Master Unit or the Backup Master Unit Remains in the Group
This scenario is the same as that of a failed Stack Master where no Backup Master is
available. The following concepts apply:
• Units whose ID numbers are 3 through 8 in this part of the original stack will not
renumber themselves, and will remain shut down until a master-enabled unit is
connected and begins to operate as the Stack Master. The Master Discovery process
discovers that the Stack Master has failed.
• In this group, the units lose connection with the Stack Master. Since they began as a
running stack and none of them are in factory default mode, renumbering does not
occur, and even a reset of the units will not affect unit ID assignment, because units
can be renumbered only by a Stack Master.
• No unit ID changes are performed in each one of the two groups.
Merging Two Stacks
To merge two working stacks and create one stack, first decide if you will merge the stacks
while the incoming units are powered off during insertion, or if both stacks will be running
when merged.
If the incoming units are powered off, follow the procedures described in “Building a New
Stack” in the “Building Automatically-Configured Stacks” or “Building Manually-Configured
Stacks” sections. Repeat the process for each unit inserted into the stack.
If both stacks to be merged are running (for example, you are connecting the stacking cables
of two stacks), the following occurs:
• If each of the joined stacks has a Stack Master unit, both Stack Master units perform the
Master Discovery process and participate in the Master Election process. One of the
Stack Master units is selected as the Stack Master unit for the merged stack. The criteria
for choosing the Stack Master are as follows:
NOTE: None of the units in either group will renumber
themselves.
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