Dell FCX624-I Laptop User Manual


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170 PowerConnect B-Series FCX Configuration Guide
53-1002266-01
PowerConnect B-Series FCX hitless stacking
5
Figure 15 illustrates hitless stacking support during stack formation. Operational stages 1 and 2
are also shown in this illustration.
FIGURE 15 Hitless stacking support during stack formation
Standby becomes Active immediately, no reboot
occurs, hot swap take place. The Standby is
assigned after 30 seconds. Traffic loss is expected.
Not allowed
Switchover
Failover
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
Switchover
Failover
Standby becomes Active immediately, no reboot
occurs. The Standby is assigned after 30 seconds.
Traffic loss is expected.
Not allowed
Switchover
Standby becomes Active (no delay), no reboot.
Standby is assigned after 30 seconds.
No traffic loss is expected.
Allowed. No traffic loss is expected.
Switchover
Failover
The boot up Standby waits
for 40 seconds then reboots
all units including itself.
Not allowed
Switchover
Failover
All units (including Standby)
are rebooted
Not allowed
Switchover
Failover
Member 2 and 3 become “orphans
Not allowed
Switchover
Failover
The stack is fully operational and ready
for rapid failover and switchover
After the stack boots up, Member 2
is a “boot up Standby”. There is
no Standby assigned yet.
Protocol ready
70 sec. for protocol learning
Wait for 30 sec. (if the Active is up > 2 min.) Wait for 60 sec. (if the Active is up < 2 min.)
Other units are hot swapped
Existing stack (after “write mem” and “reload”)
Configuration parsed on Standby
Configuration synchronized (running
config is copied from the Active)
Standby assigned by the Active
A stack is created using secure setup or “stack enable”
New Stack
Failover
1
Active 1
Member 2
Member 3
1
Active 1
Member 2
Member 3
The stack is formed and fully operational after
all units except the Active controller is rebooted
1
Active 1
Member 2
Member 3
FCX stack formation
End of Stage 1
End of Stage 2
Device stack formation