3Com EtherLink 3C985B-SX User Manual

Also see for EtherLink 3C985B-SX: Installation and user guide Installation and user guide

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3Com EtherLink 3C985B-SX User Manual Manual pdf 64 page image

Using the 3Com NIC Diagnostics Program 63Figure 19 Packet Test WindowRunning the Internal Loopback TestThe internal loopback test verifies the integrity of the NIC’son-board circuitry by writing, and then reading, data to andfrom internal memory registers.To run the internal loopback test:1 Bring up the Packet Test window (Figure 19):a Start the 3Com NIC Diagnostics program.b Click the Diagnostics tab.c Click Choose Test.2 In the Internal Loopback Test area, click Start.The Internal Packet Test window appears (Figure 20).3 In the Internal Packet Test window:a To run the test continuously, click the Continuous checkbox. To run the test just once, clear the Continuouscheck box.b Click Start.c If you chose to run the test continuously, click Stop tohalt the test.d To exit the Internal Packet Test window, click Close.