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The following interfaces provide tests, indicators, and an event log that can be used to monitor
the switch and its network connections and to help you take advantage of these proactive
networking features:
IMC - an SNMP-based network management tool that is included with your switch.
A graphical web browser interface that you can use to manage your switch from a PC running
a supported web browser, for example Microsoft Internet Explorer, and Netscape
Communicator.
A full-featured easy-to-use console interface that you can access by connecting a standard
terminal or PC running a terminal emulator to the switch's console port. The cable to make
that connection is provided with your switch. The console interface is also accessible through
a Telnet connection.
For more information on using these software tools to diagnose and manage your switch, see
the "Troubleshooting" chapter in the Management and Configuration Guide for your switch at
http://www.hpe.com/networking/support.
Hardware Diagnostic Tests
Testing the Switch by Resetting It
If you believe the switch is not operating correctly, you can reset the switch to test its circuitry
and operating code. To reset a switch, either:
unplug and plug in the power cord (power cycling)
press the Reset button on the front of the switch
reboot the switch via the management console's boot system command.
Power cycling the switch and pressing the Reset button both cause the switch to perform its
power-on self test, which almost always will resolve any temporary operational problems. These
reset processes also cause any network traffic counters to be reset to zero, and cause the System
Up Time timer to reset to zero.
Checking the Switch LEDs
See "Diagnosing With the LEDs" on
interpreting the LED patterns and LED behaviors in chapter one.
Checking Console Messages
Useful diagnostic messages may be displayed on the console screen when the switch is reset.
As described in chapter 2 under step 7, "Connect a Console to the Switch", connect a PC running
a VT-100 terminal emulator program or a standard VT-100 terminal to the switch's Console Port
and configure it to run at 9600 baud, and with the other terminal communication settings shown
on
" Configuring the Management Console" (page
the messages that are displayed. Additionally, you can check the switch event log, which can be
accessed from the console using the show log command, or from the console Main Menu.
Testing Twisted-Pair Cabling
Network cables that fail to provide a link or provide an unreliable link between the switch and the
connected network device may not be compatible with the IEEE 802.3 Type 10Base-T,
100Base-TX, or 1000Base-T standards. The twisted-pair cables attached to the Switch must be
compatible with the appropriate standards. To verify your cable is compatible with these standards,
use a qualified cable test device.
" Diagnosing with the LEDs" (page 69)
44). Then, when you reset the switch, note
for information on
Hardware Diagnostic Tests
77
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