Configuration Guide User guide

348 FastIron Configuration Guide
53-1002494-02
Hitless stacking
Figure 29 illustrates a hitless stacking switchover after the network administrator increases the
priority value of one of the stack members.
FIGURE 29 Scenario 2 – Hitless stacking switchover after a priority change
1
1
1
1
Priority 200 assigned
to Unit 3
A switchover occurs.
Stages 1 and 2
are complete.
The Standby controller
is re-assigned
The priority change triggers
re-election of the Active controller
1
FCX stack formation
FCX stack priority change - Scenario 2
Active 1 (pri=100)
Standby 2 (pri=0)
Member 3 (pri=0)
Member 4 (pri=0)
Active 1 (pri=100)
Standby 2 (pri=0)
Member 3 (pri=200)
Member 4 (pri=0)
Active 1 (pri=100)
Standby 2 (pri=0)
Member 3 (pri=200)
Member 4 (pri=0)
Active 1 (pri=100)
Member 2 (pri=0)
Standby 3 (pri=200)
Member 4 (pri=0)
Standby 1 (pri=100)
Member 2 (pri=0)
Active 3 (pri=200)
Member 4 (pri=0)
120 sec. 60 sec.