Dell PowerConnect B-FCXs Configuration Manual page 212

5
PowerConnect B-Series FCX hitless stacking
Figure 15
are also shown in this illustration.
FIGURE 15
End of Stage 1
End of Stage 2
170
illustrates hitless stacking support during stack formation. Operational stages 1 and 2
Hitless stacking support during stack formation
Device stack formation FCX stack formation
New Stack
A stack is created using secure setup or "stack enable"
Active 1
Member 2
The stack is formed and fully operational after
1
Member 3
all units except the Active controller is rebooted
Wait for 30 sec. (if the Active is up > 2 min.)
Active 1
Member 2
Standby assigned by the Active
1
Member 3
Configuration synchronized (running
config is copied from the Active)
Configuration parsed on Standby
Other units are hot swapped
70 sec. for protocol learning
Protocol ready
The stack is fully operational and ready
for rapid failover and switchover
Active 1
Member 2
Member 3
Switchover
Wait for 60 sec. (if the Active is up < 2 min.)
Switchover
Switchover
Switchover
Switchover
Switchover
After the stack boots up, Member 2
1
is a "boot up Standby". There is
no Standby assigned yet.
PowerConnect B-Series FCX Configuration Guide
Member 2 and 3 become "orphans"
Not allowed
All units (including Standby)
are rebooted
Not allowed
Standby becomes Active immediately (no delay),
no reboot occurs, configuration parsing and
hot swap take place. The Standby is assigned
after 30 seconds. Traffic loss is expected.
Not allowed
Standby becomes Active immediately, no reboot
occurs, hot swap take place. The Standby is
assigned after 30 seconds. Traffic loss is expected.
Not allowed
Standby becomes Active immediately, no reboot
occurs. The Standby is assigned after 30 seconds.
Traffic loss is expected.
Not allowed
Standby becomes Active (no delay), no reboot.
Standby is assigned after 30 seconds.
No traffic loss is expected.
Allowed. No traffic loss is expected.
The boot up Standby waits
for 40 seconds then reboots
all units including itself.
Not allowed
Switchover
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