Dell Emulex Family of Adapters - Manual (Page 1500)

Boot for the Fibre Channel Protocol User Manual P010096-01A Rev. A
8. Troubleshooting
Run Loopback Tests
1500
Diagnostic Test Specifics
PCI Loopback Test
The PCI loopback test executes the RunBuiDiag64 mailbox command once for each test
pattern. The data length for each test is 128 bytes. A loopback connector is required for
this test.
Internal and External Loopback Tests
Internal and external loopback tests execute the ElsEcho FCP command to send 124
bytes from the transmit to the receive side of an FC port. A loopback connector is
required for the external loopback test.
Internal and external loopback test menus have two configurations (data patterns and
link speeds). The data test patterns are the same as the PCI Loopback patterns
(Figure 8-4).
Figure 8-6 Internal Loopback Test Configuration Menu
Internal and external loopback link speeds have the same three options. Link speed
defaults to 1 Gb for both internal and external tests.
Figure 8-7 Internal Loopback Link Speeds Menu