Dell PowerConnect B-FCXs, Configuration Manual

Page: 222 / 1494

180 PowerConnect B-Series FCX Configuration Guide
53-1002266-01
PowerConnect B-Series FCX hitless stacking
5
Figure 21 illustrates a hitless stacking switchover after the network administrator increases the
priority value of the Standby Controller.
FIGURE 21 Scenario 1 – Hitless stacking switchover after a priority change
1
1
1
1
120 s ec.
St a ndby 2 become s the Active controller
witho u t a relo a d.
Not a llowed bec aus e prioritie s do
not m a tch.
Priority 200 ass igned to Unit 2 (St a ndby)
The priority ch a nge trigger s re-election
of the Active controller
The St a ndby controller i s re- ass igned
a nd a s witchover occ u r s .
St a ge s 1 a nd 2 a re byp ass ed.
Standby 1 (pri=100)
Active 2 (pri=200)
Member 3 (pri=0)
Member 4 (pri=0)
Active 1 (pri=100)
Standby 2 (pri=200)
Member 3 (pri=0)
Member 4 (pri=0)
Active 1 (pri=100)
Standby 2 (pri=200)
Member 3 (pri=0)
Member 4 (pri=0)
Active 1 (pri=100)
Standby 2 (pri=0)
Member 3 (pri=0)
Member 4 (pri=0)
60 s ec.
Switchover
F
a
ilover
St a ndby 2 become s the Active controller
witho u t a relo a d.
Not a llowed bec aus e prioritie s do
not m a tch.
Switchover
F
a
ilover
FCX s t a ck form a tion Device s t a ck priority ch a nge - Scen a rio 1