Stacking Topologies - SMC Networks TigerStack II SMC8848M Installation Manual

Gigabit ethernet switch
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C
S
S
ONNECTING
WITCHES IN A
TACK

Stacking Topologies

All units in the stack must be connected via stacking cable. You can
connect units in a simple cascade configuration, connecting Down ports to
Up ports, from the top unit to the bottom unit. Using this "line" topology,
if any link or unit in the stack fails, the stack is split and two separate
segments are formed. The Stack Link LEDs on the units that are
disconnected flash to indicate that the stack link between them is not
functioning. (See Table 1-2 "System Status LEDs" on page 1-6.)
When using line topology and a stack link failure occurs, the stack reboots
and a Master unit is selected within each of the two stack segments. The
Master unit will be either the unit with the Master button depressed or the
unit with the lowest MAC address if the Master button is not depressed on
any unit. When the stack reboots and resumes operations, note that the IP
address will be the same for both of the stack segments. To resolve the
conflicting IP addresses, you should manually replace the failed link or unit
as soon as possible. If you are using a wrap-around stack topology, a single
point of failure in the stack will not cause the stack to fail. It would take
two or more points of failure to break the stack apart.
If the Master unit fails or is powered off, the backup unit will take control
of the stack without any loss of configuration settings. The Slave unit with
the lowest MAC address is selected as the backup unit.
3-11

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