Reference Guide

Stacking | 923
Creating a New Stack
Prior to creating a stack, know which unit will be the management unit and which will be the standby unit.
You must also enable the front ports of the units for stacking. For more information, see “Enable Front End
Port Stacking” on page 922.
To create a new stack:
Step Task Command Syntax Command Mode
1 Power up all units in the stack
2 Verify that each unit has the same FTOS version
prior to stacking them together.
show version
EXEC Privilege
3 Manually configure unit numbers for each unit,
so that the stacking is deterministic upon boot up.
Renumbering will cause the unit to reboot. The
stack-unit default for all new units is stack-unit 0.
stack-unit 0 renumber
EXEC Privilege
4 Configure the switch priority for each unit to
make management unit selection deterministic.
stack-unit priority
CONFIGURATION
5 Assign a stack group for each unit. Begin with the
first port on the management unit. Next,
configure both ports on each subsequent unit.
Finally, return to the management unit and
configure the last port. (See the example below.)
Range: 0 to 15
stack-unit id stack-group id
CONFIGURATION
6 Connect the units using stacking cables.
Note: The S4810 and S4820T do not require special stacking cables. The cables used to connect the data ports
are sufficient.