HP J4899B User Manual - Page 54

Testing Twisted-Pair Cabling, Testing Switch-to-Device Network Communications - layer 3

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Troubleshooting Hardware Diagnostic Tests 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 2650 must be compatible with the appropriate standards. To verify that your cable is compatible with these standards, use a qualified cable test device. Testing Switch-to-Device Network Communications You can perform the following communication tests to verify that the network is operating correctly between the switch and any connected device that can respond correctly to the communication test. ■ Link Test -- a physical layer test that sends IEEE 802.2 test packets to any device identified by its MAC address ■ Ping Test -- a network layer test used on IP networks that sends test packets to any device identified by its IP address These tests can be performed through the switch console interface from a terminal connected to the switch or through a Telnet connection, or from the switch's web browser interface. For more information, see the Management and Configuration Guide, which is on the Documentation CD-ROM that came with your switch. These tests can also be performed from an SNMP network management station running a program that can manage the switch, for example, HP TopTools for Hubs & Switches. Testing End-to-End Network Communications Both the switch and the cabling can be tested by running an end-to-end communications test -- a test that sends known data from one network device to another through the switch. For example, if you have two PCs on the network that have LAN adapters between which you can run a link-level test or Ping test through the switch, you can use this test to verify that the entire communication path between the two PCs is functioning correctly. See your LAN adapter documentation for more information on running a link test or Ping test. 4-10 Troubleshooting

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4-10
Troubleshooting
Hardware Diagnostic Tests
Troubleshooting
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 2650 must be compatible with the
appropriate standards. To verify that your cable is compatible with these
standards, use a qualified cable test device.
Testing Switch-to-Device Network Communications
You can perform the following communication tests to verify that the network
is operating correctly between the switch and any connected device that can
respond correctly to the communication test.
■
Link Test -- a physical layer test that sends IEEE 802.2 test packets to any
device identified by its MAC address
■
Ping Test -- a network layer test used on IP networks that sends test
packets to any device identified by its IP address
These tests can be performed through the switch console interface from a
terminal connected to the switch or through a Telnet connection, or from the
switch’s web browser interface. For more information, see the
Management
and Configuration Guide,
which is on the Documentation CD-ROM that came
with your switch.
These tests can also be performed from an SNMP network management
station running a program that can manage the switch, for example, HP
TopTools for Hubs & Switches.
Testing End-to-End Network Communications
Both the switch and the cabling can be tested by running an end-to-end
communications test -- a test that sends known data from one network device
to another through the switch. For example, if you have two PCs on the
network that have LAN adapters between which you can run a link-level test
or Ping test through the switch, you can use this test to verify that the entire
communication path between the two PCs is functioning correctly. See your
LAN adapter documentation for more information on running a link test or
Ping test.