Huawei S Series White Paper page 26

S Series Switches
iStack Technology White Paper
Figure 2-12 Original master and standby switches are in the same stack after the original stack
splits
SwitchB
Standby
Figure 2-13 Packet exchange during a stack split
SwitchA
(Master)
Processes
the NBR Lost
packet in a
similar manner
as a member
switch leaves
a stack
Running state
Issue 01 (2013-05-25)
SwitchA
Master
SwitchB
Standby
SwitchA
Master
Stack1
SwitchB
(Standby)
Nbr Lost
Running state
Running state
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SwitchE
Stack1
SwitchC
Slave
Stack split
SwitchD
Master
Stack2
SwitchC
Slave
SwitchC
(Slave)
Detects that the
master switch is lost
and then restarts
2 Technology Description
Slave
SwitchD
Slave
SwitchE
Slave
SwitchD
(Slave)
Detects that the
master switch is lost
and then restarts
A stack is set up
SwitchE
(Slave)
22