Dell Force10 MXL Blade - Assigning a Priority to Stacked Switches

554 | Stacking
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Assigning a Priority to Stacked Switches
To configure 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 Configuration 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.
To revert the management priority of a stack unit to the default value of 0, use the
no form of the stack-unit
unit-number
priority number command.
After you reconfigure the priorities of stacked switches, reload the stack so that a new master and standby
election is performed.
3 Configure a 40GbE port for stacking mode, where:
stack-unit <unit-number> is the unit-number of the
member stack unit. Valid values: 0 to 5. Default value: 0.
stack-group group-number is the number of stacked port
on unit. Valid values: 0 to 1 (Figure 31-5).
stack-unit unit-number
stack-group group-number
CONFIGURATION
4 Save the stacking configuration on the 40GbE ports.
write memory
EXEC PRIVILEGE
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.
reload
EXEC PRIVILEGE
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
configuration of each stacked switch is stored in the running configuration 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
(Figure 31-8).
To configure 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).
Task Command Syntax Command Mode
Configure the priority of stacked switches to determine stack
mastership, where
stack-unit unit-number identifies the switch in the stack.
priority priority-number specifies the management priority.
Range: 1-14. Default: 0.
stack-unit unit-number priority
number
CONFIGURATION
Step Task Command Syntax Command Mode