White Papers

To display the stack-unit number, use the show system brief command.
Removing a Stack Group from Stacking Mode
To remove a stack group of four 10 GbE ports or one 40 GbE port from the stack, use the no form of the stack-unit
unit-number stack-group number command.
After entering the command, save the configuration and if necessary, re-attach the cables to ports in a different stack group
that has been enabled for stacking. Then reload the stack for the change to take effect.
1. Remove a stacking port from a stack.
CONFIGURATION mode
no stack-unit unit-number stack-group group
2. Save the port configuration.
EXEC Privilege mode
write memory
3. Reload the stack for the port reconfiguration to take effect.
EXEC Privilege mode
reload
Remove a Switch from a Stack
After you remove all ports from an S5000 stack, the switch functions in standalone mode but retains the running and startup
configuration that was last synchronized by the master switch while it operated as a stack unit.
For more information, refer to Removing a Stack Group from Stacking Mode.
To remove a switch from a stack, disconnect the stacking cables from the unit either when the unit is powered on or off and is
online or offline.
If you remove a unit from the middle of a daisy-chained stack, the stack is split into two parts. Each split stack forms a new
stack according to MAC addresses or assigned priorities, as described in Configuring Stacking Ports and Bringing Up a Stack
and Assigning a Priority to Stacked Switches.
Adding a Stack Unit
Before you add a unit to an S5000 stack, to verify that the switch is running the same Dell networking OS version. use the
show version command, then power down the switch.
You can add a new powered-down unit to an existing stack both when the unit has no stacking ports (stack groups) configured
and when the unit already has stacking ports configured. If you add a unit that was previously configured for stacking to a stack,
it is assigned the smallest available unit number in the stack.
You can also pre-configure a stack unit number and priority on the switch to be added by using the following commands.
● On the stack, determine the next available stack-unit number and the management priority of the management unit.
EXEC Privilege mode
show system brief show system stack-unit
● On the new unit, configure the next available stack-unit number.
EXEC Privilege mode
stack-unit renumber
● On the new unit, assign a management priority based on whether you want the new unit to be the stack manager.
CONFIGURATION mode
stack-unit priority
844
Stacking