Running The Packet Tests - 3Com EtherLink 3C985B-SX User Manual

62 C
HAPTER

Running the Packet Tests

Run the packet tests to check the NIC's ability to transfer
packets.
Table 5 Packet Tests
Test
Internal Loopback
External Loopback Checks port and transceiver integrity
Transmit/Receive
Echo
To run the packet tests:
1 Start the 3Com NIC Diagnostics program.
2 Click the Diagnostics tab.
3 Click Choose Test.
The Packet Test window appears
5: D
IAGNOSTICS AND
Table 5 describes the packet tests.
Description
Checks on-board circuitry of the NIC
by writing, and then reading, data to
and from internal memory registers.
by comparing transmitted and
received packets. Requires an external
loopback plug. For more information
on building an external loopback plug,
see Constructing Loopback Plugs
the end of this chapter.
Tests the ability of the NIC to
transmit or receive packets from
another computer. Requires two
connected computers.
Checks system connectivity by testing
the ability of the NIC to send and
respond to echo packets. Requires
two connected computers.
T
ROUBLESHOOTING
near
(Figure
Statistics Collected
(All Tests)
Packets transmitted
Packets received
Errors detected
rxBadCRC
rxCollDet
rxLinkLost
rxPhyDecode
rxOddNybl
rxMacAbort
rxShort
rxTrunc
19).