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Chapter 8: Power and Cooling Problems
8. Power and Cooling Problems
8.1 Installation
If the power indicator does not turn on when the power cord is plugged in, you may have a problem with the power outlet,
power cord, or internal power supply. However, if the unit powers off after running for a while, check for loose power connec-
tions, power losses or surges at the power outlet. If you still cannot isolate the problem, the internal power supply may be
defective. Verify that all system components have been properly installed. If one or more components appear to be
malfunctioning (such as the power cord or network cabling), test them in an alternate environment where you are sure that all
the other components are functioning properly.
8.2 In-Band Access
You can access the management agent in the switch from anywhere within the attached network using Telnet, via a Web
browser. You must first configure the switch with a valid IP address, subnet mask, and default gateway. If you have trouble
establishing a link to the management agent, check to see if you have a valid network connection. Then verify that you entered
the correct IP address. Also, be sure the port through which you are connecting to the switch has not been disabled. If it has not
been disabled, then check the network cabling that runs between your remote location and the switch.
NOTE: The management agent accepts up to four simultaneous Telnet sessions. If the maximum number of sessions already
exists, an additional Telnet connection will not be able to log into the system.
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