This test decides which kind of loop-back test should be executed: MAC loop-back or PHY loop-back tests. The way the test is executed is always the same. This test sends 20,000 packets in each of 3 separate test passes. The first pass sends packets full of only 0s. The second pass sends packets full of only 1s. The third pass uses a marching data pattern (0x00, 0x01, 0x02 … 0xFF). The packets are fully validated. The test will fail if any sent packet is not received or if a single data validation failure occurs.
Scenarios of Loopback test pass/fail
Test |
Description |
PASS |
Diagnostic test passed. If the transmission through a network adapter still does not work, please check the network cable. |
FAIL |
Diagnostic test failed. Any of returned values indicate that the hardware is damaged and there is not a way to resolve this problem. |