Administrator Guide

Figure 127. Stack-Group Assignments
1. Stack-group 0 (Ports 1, 2, 3, and 4) 2. Stack-group 1 (Ports 5, 6, 7, and 8)
3. Stack-group 2 (Ports 9, 10, 11, and 12) 4. Stack-group 3 (Ports 13, 14, 15, and 16)
5. Stack-group 12 (Port 49) 6. Stack-group 14 (Port 51)
7. Stack-group 16 (Port 53) 8. Stack-group 17 (Port 54)
9. Stack-group 15 (Port 52) 10. Stack-group 13 (Port 50)
You can connect the units while they are powered down or up. Stacking ports are bi-directional.
Syslog messages are generated by the management unit:
• before the management unit downloads its Dell EMC Networking OS version 8.3.12.0 or later to the new unit. The syslog includes the
unit number, previous version, and version being downloaded.
• when the firmware synchronization is complete.
• if the system check fails, a message such as a hardware incompatibility message or incompatible uboot version is generated. If the unit
is placed in a card problem state, the management unit also generates an SNMP trap.
• if the software version of the new unit predates Dell EMC Networking OS version 8.3.12.0 , the management unit puts the new unit
into a card problem state and generates a syslog that identifies the unit, its Dell EMC Networking OS version, and its incompatibility for
firmware synchronization.
NOTE:
You must enter the stack-unit stack-unit stack-group stack-group command when adding units to a
stack to ensure the units are assigned to the correct groups.
NOTE: Any scripts used to streamline the stacking configuration process must be updated to reflect the Command
Mode change from EXEC to CONFIGURATION to allow the scripts to work correctly.
Enabling Front End Port Stacking
To enable the front ports on a unit for stacking, use the following commands.
NOTE: You can stack a maximum of eight 10G stack ports.
NOTE: After a port is allocated for stacking, you can only use it for stacking. If stack-group 0 is allocated for stacking,
you can use ports 1, 2, 3, and 4 for stacking but not for Ethernet anymore. If only port 1 is used for stacking, ports 2, 3,
and 4 are spare; they cannot be used for Ethernet.
1. Assign a stack group for each unit.
CONFIGURATION mode
stack-unit id 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.
The range is from 0 to 17.
2. Save the stacking configuration on the ports.
EXEC Privilege mode
write memory
3. Reload the switch.
EXEC Privilege mode
reload
Dell EMC Networking OS automatically assigns a number to the new unit and adds it as member switch in the stack.
The new unit synchronizes its running and startup configurations with the stack.
4. After the units are reloaded, the system reboots. The units come up in a stack after the reboot completes.
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Stacking