Connectivity Guide

2 1 up UNKNOWN up 10768
2 2 down UNKNOWN down 0
3 1 up UNKNOWN up 10672
3 2 absent absent 0
-- Fan Status --
Unit Bay TrayStatus Fan0 Speed Fan1 Speed
------------------------------------------------------------------------------------
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
Influencing 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.
● Influence 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
redundancy force-failover stack-unit
902
Stacking