Dell Brocade 6520 Command Reference Supporting Fabric OS v7.1.0 - Page 804

2 portLoopbackTest NOTES OPERANDS At each pass, the frame is created from a different data type of a palette of seven. If seven passes are requested, seven different data types are used in the test. If eight passes are requested, the first seven frames use unique data types, and the eighth is the same as the first. The seven data types are: CSPAT: 0x7e, 0x7e, 0x7e, 0x7e, ... BYTE_LFSR: 0x69, 0x01, 0x02, 0x05, ... CHALF_SQ: 0x4a, 0x4a, 0x4a, 0x4a, ... QUAD_NOT: 0x00, 0xff, 0x00, 0xff, ... CQTR_SQ: 0x78, 0x78, 0x78, 0x78, ... CRPAT: 0xbc, 0xbc, 0x23, 0x47, ... RANDOM: 0x25, 0x7f, 0x6e, 0x9a, .... Do not abort this test prematurely, using CTRL-C or q to quit. Doing so may cause the test to report unexpected errors. Errors may vary depending on the hardware platform. On 10 Gbps or 16 Gbps (Condor3-based) platforms, you cannot interrupt the test by pressing the return key (). This command does not support High Availability (HA). The Brocade DCX series cannot negotiate speeds of 1 Gbps. This diagnostic cannot be run on an operational switch. You must disable the switch using the chassisDisable command before you can run this test. After the test completes, re-enable the switch using the chassisEnable command. Do not use the switchDisable command followed by manually shutting down the ports before running the test. This will not work because executing switchEnable after the test completes will leave the ports in the same state as before. The only way to bring the ports down before running the test and back up after the test completes is by using the chassisDisable command followed by the chassisEnable command. The Brocade FCoE10-24 blade (ceePortLoopbackTest) supports only lb_mode 1, 2, and 8. The execution of this command is subject to Virtual Fabric or Admin Domain restrictions that may be in place. Refer to Chapter 1, "Using Fabric OS Commands" and Appendix A, "Command Availability" for details. This command has the following operands: --slot slot Specifies the number of the slot on which to run the diagnostics. All eligible ports relative to the slot number are tested. The default is 0 and designed to operate on fixed-port-count products. -nframes count Specifies the number of frames to send. The test progresses until the specified number of frames has been transmitted on each port. The default value is 1. -lb_mode mode Specifies the loopback mode for the test. By default, this test uses the internal loopback. Valid values depend on the platform on which the command is executed. Unsupported values are rejected with an appropriate message. To run this test with mode values of 1 and 7, loopback cables must be connected to all front end ports or the test will fail. 1 Port Loopback (loopback plugs) 2 External (SERDES) loopback 5 Internal (parallel) loopback 7 Backend bypass & port loopback 776 Fabric OS Command Reference 53-1002746-01