SMC Networks TigerSwitch manual Stack Operations, Selecting the Stack Master

STACK OPERATIONS

Stack Operations

Up to eight switches can be stacked together as described in the Installation Guide. One unit in the stack acts as the Master for configuration tasks and firmware upgrade. All of the other units function in Slave mode.

To configure any unit in the stack, first verify the unit number by counting down from the Master unit, and then select the appropriate unit number from the web or console management interface.

Selecting the Stack Master

Note the following points about unit numbering:

•When the stack is initially powered on, the Master unit is designated as unit 1. The stack is simply numbered from top to bottom, with the first unit in the stack designated at unit 1. This unit identification number can be selected on the front panel graphic of the web interface, or from the CLI.

•If more than one stack Master is selected using the Master push button on the switch’s front panel, the stack will not function.

•If any unit fails, the stack will not function. You must replace the failed unit, and reconnect the stacking cables to restore a ring topology.

•If a unit in the stack fails or is removed from the stack, the unit numbers will not change. This means that when you replace a unit in the stack, the original configuration for the failed unit will be restored to the replacement unit.

Recovering from Stack Failure or Topology Change

When a link or unit in the stack fails, a trap message is sent and a failure event is logged. The stack will be rebooted after any system failure or topology change. It takes two to three minutes for the stack to reboot. Also note that powering down a unit or inserting a new unit in the stack will cause the stack to reboot.

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