Concept Guide

1 1 up up 10134 up 10031
1 2 up up 10031 up 9929
1 3 up up 10031 up 10031
2 1 up up 10031 up 10031
2 2 up up 10031 up 10031
2 3 up up 10031 up 10134
3 1 up up 10031 up 10134
3 2 up up 10031 up 10031
3 3 up up 10031 up 10031
Speed in RPM
DellEMC#
The following example shows the show system stack-ports command.
DellEMC#show system stack-ports
Topology: Ring
Interface Connection Link Speed Admin Link Trunk
(Gb/s) Status Status Group
------------------------------------------------------------------
1/56 3/56 40 up up
1/60 3/60 40 up up
3/48 40 up down
3/52 40 up down
3/56 0/56 40 up up
3/60 0/60 40 up up
Inuencing Management Unit Selection on a Stack
Stack priority is the system variable that Dell EMC Networking OS uses to determine which units in the stack are the master and standby
management units. If multiple units tie for highest priority, the unit with the highest MAC address prevails.
If management was determined by priority only, a change in management occurs when:
• the management unit is powered down or a failover occurs.
• you disconnect the management unit from the stack.
When the management unit fails, the unit disappears from the stack topology. At that time, the standby unit detects the communication
loss and switches from the standby unit role to the management unit role in the stack. From the remaining units in the stack, the system
selects a new standby unit based on the unit priority using the same algorithm used when the stack was initially created. When the failed
unit recovers, it takes the next available role, usually that of a stack member.
• Inuence the selection of the stack management units.
CONFIGURATION mode
stack-unit unit-number priority priority-value
The unit with the numerically highest priority is elected the master management unit, and the unit with the second highest priority is
the standby unit.
The range is from 1 to 14.
The default is 0.
Managing Redundancy on a Stack
Use the following commands to manage the redundancy on a stack.
• Reset the current management unit and make the standby unit the new master unit.
EXEC Privilege mode
998
Stacking