Administrator Guide

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Dell> enable
Dell# congure
3. Congure a 40GbE port for stacking mode.
CONFIGURATION mode
stack-unit unit-number stack-group group-number
The valid values are from 0 to 5.
The default value is 0.
• stack-unit <unit-number>: is the unit-number of the member stack unit.
• stack-group group-number is the number of stacked port on unit. The valid values are from 0 to 1.
4. Save the stacking conguration on the 40GbE ports.
EXEC PRIVILEGE mode
write memory
5. Repeat Steps 1 to 4 on each MXL 10/40GbE switch in the stack.
6. Log on to the CLI and reboot each switch, one after another, in as short a time as possible.
EXEC PRIVILEGE mode
reload
NOTE: If the stacked switches all reboot at approximately the same time, the switch with the highest MAC address is
automatically elected as the master switch. The switch with the next highest MAC address is elected as standby. As each
switch joins the stack, it is assigned the lowest available stack-unit number from 0 to 5. The default conguration of each
stacked switch is stored in the running conguration of the stack. The stack-unit ID numbers are retained after future
stack reloads.
To verify the stack-unit number assigned to each switch in the stack, use the show system brief command.
To congure stacked switches so that stacking roles are determined by preset priorities, use the stack-unit priority
command (refer to Assigning a Priority to Stacked Switches).
Assigning a Priority to Stacked Switches
To congure the stack so that the roles are assigned according to pre-determined priorities instead of using the highest MAC
addresses, use the stack-unit priority command in Global Conguration mode on each stacked switch.
The switch with the highest priority number is elected master. The switch with the next highest priority number is elected standby
and takes over stack management if the master switch fails.
Congure the priority of stacked switches to determine stack mastership.
CONFIGURATION mode
stack-unit unit-number priority number
• stack-unit unit-number identies the switch in the stack.
• priority priority-number species the management priority.
The valid range is from 1 to 14.
Stacking
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