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GS700TS Smart Switch Software Administration Manual
Managing System Settings 3-10
v1.0, June 2009
connects stacking members from one to the next. This provides a single data path flow. The
stacking members linked in the middle of the chain are connected to the stacking member on either
side of them. The members at the end of the chain only have one connection.
Stacking Ring Topology
One of the benefits of the Ring topology is that it offers redundancy in case the connections
between two units fail, including the case where a unit in the stack fails. If a failure occurs in the
stacking topology, the stack reverts to the Chain stacking topology. In the Chain topology, devices
operate in a chain formation. The system automatically switches to a Stacking Failover topology
without any system downtime. An SNMP message is automatically generated, but no stack
management action is required. However, the stacking link or stacking member must be repaired
to return to the Ring topology.
After the stacking issues are resolved, the device can be reconnected to the stack without
interruption and the Ring topology is restored.
Stacking Ports
The mode type determines the Gigabit Ethernet ports that are configurable by the user.
• In Standalone mode all Gigabit Ethernet ports are available.
• In Stack mode two dedicated Gigabit Ethernet ports are used for stack connection.
The factory default of the device is stack mode. Use the System Information screen to change the
unit mode from Standalone to Stack mode.
The ports used for stacking can be either the combo ports or the copper ports. By default, the
copper ports are reserved for stacking. The Stack Management screen allows network managers to
configure the combo ports as the stacking ports.
Two full-duplex stacking link up/down ports are available via HDMI connectors and provide 10
Gps throughput stacking capacity.
Stacking Members and Unit No.
Stacking Unit Numbers are essential to the stacking configuration. Unit No. 1 and Unit No. 2 are
reserved for Master enabled units. Unit Numbers 3 to 6 can be defined for stack members. When
the Master unit boots or when inserting or removing a stack member, the Master unit initiates a
stacking discovering process.
If two members are discovered with the same Unit No., the stack continues to function. However,
only the unit with the older join time joins the stack. A message is sent to the user, notifying that a
unit failed to join the stack.