Administrator Guide

To view the port assignments, use the show system stack-unit command.
Creating a New Stack
Prior to creating a stack, know which unit will be the management unit and which will be the standby unit.
Enable the front ports of the units for stacking. For more information, refer to Enabling Front End Port Stacking.
To create a new stack, use the following commands.
1. Power up all units in the stack.
2. Verify that each unit has the same Dell EMC Networking OS version prior to stacking them together.
EXEC Privilege mode
show version
3. Manually configure unit numbers for each unit, so that the stacking is deterministic upon boot up.
EXEC Privilege mode
stack-unit stack—unit—number renumber stack—unit—number.
Renumbering causes the unit to reboot. The stack-unit default for all new units is stack-unit 1.
4. Configure the switch priority for each unit to make management unit selection deterministic.
CONFIGURATION mode
stack-unit stack—unit—number priority priority
5. Assign a stack group for each unit.
CONFIGURATION mode
stack-unit stack-unit—id stack-group stack-group—id
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. (refer to the following example.)
6. Connect the units using stacking cables.
NOTE: The device does not require special stacking cables. The cables used to connect the data ports are sufficient.
7. Reload the stack one unit at a time.
EXEC Privilege mode
show system brief
Start with the management unit, then the standby, then each of the members in order of their assigned stack number (or the position
in the stack you want each unit to take).
Allow each unit to completely boot, and verify that the stack manager detects the unit, then power the next unit.
In the above example, stack unit 1 is the master management unit, stack unit 2 is the standby unit. The cables are connected to each unit.
Configure the stack groups on the units in the following order:
• Configure the first stack group on unit 1: stack-unit 1 stack-group 1
• Configure the stack groups on unit 2: stack-unit 2 stack-group 0 and stack-unit 2 stack-group 1
• Configure the stack groups on unit 3: stack-unit 3 stack-group 0 and stack-unit 3 stack-group 1
• Configure the stack groups on unit 4: stack-unit 4 stack-group 1 and stack-unit 4 stack-group 1
• Configure the final stack-group on unit 1 to complete the stack: stack-unit 1 stack-group 0
When the stack-group configuration is complete, the system prints a syslog for reload.
DellEMC#configure
DellEMC(conf)#stack-unit 4 stack-group 0
DellEMC(conf)#02:39:12: %STKUNIT4-M:CP %IFMGR-6-STACK_PORTS_ADDED: Ports Te 4/49 have been
configured as
stacking ports. Please save and reload for config to take effect
DellEMC(conf)#stack-unit 4 stack-group 1
DellEMC(conf)#02:39:15: %STKUNIT4-M:CP %IFMGR-6-STACK_PORTS_ADDED: Ports Fo 4/50 have been
configured as
stacking ports. Please save and reload for config to take effect
DellEMC(conf)#
DellEMC#02:39:18: %STKUNIT4-M:CP %SYS-5-CONFIG_I: Configured from console
Reload each unit in the stack. After the reload is complete, the four units come up as a stack with unit 1 as the management unit, unit 2 as
the standby unit, and the remaining units as stack-members. All units in the stack can be accessed from the management unit.
778
Stacking