Chapter
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Chapter 3: Connecting the Switch
Stack Troubleshooting and Maintenance
Linksys One Ready Communications Solution
We recommend that when combining two stacks, you reset the switches in one stack to
factory default mode and then add the switches as described in “Adding Units to a
Running Stack” in the “Building Automatically-Configured Stacks” section.
• If one of the merged stacks had neither a Stack Master unit nor a Backup Master unit,
then units belonging to this group are inserted into the stack as described in “Replacing
a Failed Member Stack Unit in an Operational Stack.” The Master either connects the
running units to the stack using the current Unit ID numbers or renumbers them.
Understanding Stacking Cable Failure
If the stacking connection cables fail and cause a stack split, the scenario described in
“Merging Two Stacks” applies. This occurs only if the stack uses a chain topology. Single
stacking cable failure will not cause a stack split if a ring topology is used.
Inserting Too Many Units into a Stack
If you try to insert too many units into a stack, when all units (existing and newly inserted)
are powered on at the same time, the following occurs:
1. A Stack Master is elected following the Master Discovery and Master Election processes.
All other units are shut down.
NOTE: Any time two stacks are combined into one stack,
there is no way to maintain the configuration for both sets
of switches. All dynamic information of the units that
belong to the portion of the stack that was not re-elected
to be the Stack Master is relearned.
NOTE: Occasionally, due to a race condition during the
boot process, some of the units might be connected and
join the stack.
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