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3
Installing the Switch
5.
Select the Master unit in the stack by pressing the Master button in on only one
of the switches. Only one switch in the stack can operate as the Master, all
other units operate in slave mode. If more than one switch in the stack is
selected as Master, or if no switches are selected, the system will select the unit
with the lowest MAC address as the Master.
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 1-4).
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.
Connecting to a Power Source
To connect a device to a power source:
1.
Insert the power cable plug directly into the socket located at the back of the
device.
2.
Plug the other end of the cable into a grounded, 3-pin, AC power source.
Note: For international use, you may need to change the AC line cord. You must
use a line cord set that has been approved for the socket type in your country.
3-8
Figure 3-8 Power Socket
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Troubleshooting
