Dell PowerConnect B-FCXs Configuration Manual page 223

Figure 22
priority value of one of the stack members.
FIGURE 22
Priority 200 assigned
PowerConnect B-Series FCX Configuration Guide
53-1002266-01
illustrates a hitless stacking switchover after the network administrator increases the
Scenario 2 – Hitless stacking switchover after a priority change
Device stack priority change - Scenario 2
Active 1 (pri=100)
Standby 2 (pri=0)
1
Member 3 (pri=0)
Member 4 (pri=0)
to Unit 3
Active 1 (pri=100)
Standby 2 (pri=0)
1
Member 3 (pri=200)
120 sec.
Member 4 (pri=0)
The priority change triggers
re-election of the Active controller
PowerConnect B-Series FCX hitless stacking
FCX stack formation
Active 1 (pri=100)
Standby 2 (pri=0)
1
Member 3 (pri=200)
60 sec.
Member 4 (pri=0)
Standby 1 (pri=100)
Member 2 (pri=0)
1
Active 3 (pri=200)
Member 4 (pri=0)
A switchover occurs.
Stages 1 and 2
are complete.
Active 1 (pri=100)
Member 2 (pri=0)
1
Standby 3 (pri=200)
Member 4 (pri=0)
The Standby controller
is re-assigned
5
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