Replacing A Member Switch - Huawei Quidway S3700 Series Configuration Manual

Quidway S3700 Series Ethernet Switches
Configuration Guide - Device Management
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When a member switch restarts, the master switch recalculates the stack topology and delivers
the stack routing table. Then, the member switch rejoins the stack as a standby or slave switch.

Replacing a Member Switch

If a stack system runs stably, replacing a member switch indicates that a member switch quits
the stack system first and then a new member switch joins the stack system. For more details,
see the description of adding a member switch to a stack system and quitting a stack system.
Replacing a member switch requires that the stack cables connecting the replaced switches to
other switches be removed.
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Switchover Between the Master and Standby Switches
After a stack system is created, the standby switch automatically becomes the master switch if
the master switch is faulty or exits from the stack system. The new master switch specifies the
new slave switch and data is synchronized on the master and slave switches.
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Frequent switchovers may cause split of the stack.
Issue 01 (2011-07-15)
If the standby switch restarts, the master switch specifies another member switch as the
standby switch and synchronizes data to the new standby switch.
When the master and standby switches restart at the same time, all the other member
switches in the stack system restart and recreate a stack system.
If the master switch is replaced, the standby switch becomes the master switch, and then
specifies another member switch as the standby switch and synchronizes data to the new
standby switch.
If the standby switch is replaced, the master switch specifies another member switch as the
standby switch and synchronizes data to the new standby switch.
After a stack system is created for the first time, the MAC address of the stack system is
the MAC address of the master switch. When the master switch is faulty or quits the stack
system, the MAC address of the stack system is immediately switched to be that of the
newly-elected master switch if the function of the delay in switching the MAC address of
the stack system is disabled. By default, the MAC address switchover is enabled and the
delay for switchover is 10 minutes.
When a stack system is created, the MAC address of the stack system is switched to be that
of the newly-elected master switch, if the master switch is faulty or quits the stack system,
the stack system is configured with the MAC address switchover time, and the quitting
switch does not rejoin the stack within the switchover timeout interval. If the quitting switch
rejoins the stack before the switchover timer expires, the switch becomes a slave and the
MAC address of the stack system remains unchanged. In this case, the MAC address of the
stack system is the MAC address of a slave switch.
When a slave switch quits a stack system, the MAC address of the stack system is switched
to be that of the master switch, if the MAC address of the stack system is the same as that
of the quitting slave switch and the quitting slave switch does not rejoin the stack after the
switchover timer times out.
CAUTION
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