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DGS-3130 Series Layer 3 Stackable Managed Switch Web UI Reference Guide
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Figure 4-69 Duplex Ring stacking topology (SFP+)
NOTE: For more stacking topologies, please refer to Switch Stacking section in DGS-3130-Series
HW Installation Guide.
Switch Roles in a Stack
Within each of these topologies, each Switch plays a role in the Switch stack. These roles can be set by the user per
individual Switch, or if desired, can be automatically determined by the Switch stack. Three possible roles exist when
stacking with the Switch.
Primary Master - The Primary Master is the leader of the stack. It will maintain normal operations, monitor operations
and the running topology of the Stack. This Switch will also assign Stack Unit IDs, synchronize configurations and
transmit commands to remaining Switches in the Switch stack. The Primary Master can be manually set by assigning
this Switch the highest priority (a lower number denotes a higher priority) before physically assembling the stack, or it
can be determined automatically by the stack through an election process. This determines the lowest MAC address
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