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Chapter 3: Connecting the Switch
Stack Troubleshooting and Maintenance
Linksys One Ready Communications Solution
Chapter
3
When a running group of units is added to an existing stack and each one of the stack
groups has an elected Stack Master, and the total of existing units and inserted units exceeds
the maximum allowed number of units (8) in a stack:
• The Master Detection and Master Election processes determine the Stack Master out
of one of the two combined stacking groups.
• When switches are added to a running stack, the Unit ID Allocation and Duplicate
ID conflict resolution processes detect an error if too many switches are present in the
stack, and no changes are made to units that originally belonged to the group
managed by the newly-elected Stack Master. The original switches retain their ID
assignments and configurations. The units that originally belonged to the group
managed by the Stack Master that lost its “mastership” are shut down.
Inserting a Standalone Unit into a Running Stack
If a unit is in standalone mode, it will not participate in the Master Discovery process (it will
not look for a Stack Master and will not respond to master queries). As a result, it will not
join the stack but will continue to run as a standalone unit. The ports that are connected to
the other units’ stacking links will not pass any traffic, and the Stack Master will consider
them as failed stacking links and route all traffic around them.
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