White Papers

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:
When the stack-group configuration is complete, the system prints a syslog for reload.
DellEMC#configure
DellEMC(conf)#stack-unit 4 stack-group 13
DellEMC(conf)#02:39:12: %STKUNIT4-M:CP %IFMGR-6-STACK_PORTS_ADDED: Ports Fo 4/52 have
been configured as
stacking ports. Please save and reload for config to take effect
DellEMC(conf)#stack-unit 4 stack-group 14
DellEMC(conf)#02:39:15: %STKUNIT4-M:CP %IFMGR-6-STACK_PORTS_ADDED: Ports Fo 4/56 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.
NOTE: Before executing show commands, you must wait for 10 to 15 seconds for the download-agent process to start.
To view the stack unit information after the reload, use the show system brief command.
Add Units to an Existing Stack
You can add units to an existing stack in one of three ways.
● By manually assigning a new unconfigured unit a position in an existing stack.
● By adding a configured unit to an existing stack.
● By merging two stacks.
If you are adding units to an existing stack, you can either:
● allow Dell EMC Networking OS to automatically assign the new unit a position in the stack, or
● manually determine each units position in the stack by configuring each unit to correspond with the stack before connecting
it.
● If you add a unit that has a stack number that conflicts with the stack, the stack assigns the first available stack number.
● If the stack has a provision for the stack-number that will be assigned to the new unit, the provision must match the unit
type, or Dell EMC Networking OS generates a type mismatch error.
After the new unit loads, it synchronizes its running and startup configurations with the stack.
Manually Assigning a New Unit to an Existing Stack
To manually assign a new unit a position in an existing stack, use the following steps.
1. On the stack, determine the next available stack-unit number, and the management priority of the management unit.
EXEC Privilege mode
show system brief or show system stack-unit
2. On the new unit, number it the next available stack-unit number.
EXEC Privilege mode
stack-unit stack-unit-number renumber stack-unit-new-number
3. (OPTIONAL) On the new unit, assign a management priority based on whether you want the new unit to be the stack
manager.
Stacking
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