Influencing Management Unit Selection On An S-Series Stack - Dell S4820T Configuration Manual

-- Stack Info --
Unit UnitType Status
--------------------------------------------------------
0 Member not present
1 Member not present
2 Member not present
3 Management online
4 Member not present
5 Member not present
6 Member not present
7 Member not present
8 Member not present
9 Member not present
10 Member not present
11 Member not present
The following example shows the show system stack-ports command.
Dell#show system stack-ports
Topology: Ring
Interface Connection Link Speed Admin
------------------------------------------------------------------
1/56 3/56
1/60 3/60
3/48
3/52
3/56 0/56
3/60 0/60

Influencing Management Unit Selection on an S-Series Stack

Stack priority is the system variable that Dell 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 priority
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.
928
ReqTyp CurTyp
S4810 S4810
(Gb/s) Status Status Group
40 up
40 up
40 up
40 up
40 up
40 up
Version Ports
8-3-12-13 64
Link Trunk
up
up
down
down
up
up
Stacking