HP StorageWorks 8/80 Brocade Fabric OS Command Reference Guide v6.1.0 (53-1000 - Page 530

2 portLoopbackTest portLoopbackTest Performs a functional test of port N->N path. Synopsis portloopbacktest [--slot number][-nframes count][-lb_mode mode][-spd_mode mode] [-ports itemlist] Description Use this command to verify the functional operation of the switch by sending frames from the port N transmitter and looping them back into the same port N receiver. The loopback is done at the parallel loopback path. The path exercised in this test does not include the media or the fibre cable. Only one frame is transmitted and received at a time. No external cable is required to run this test. The port LEDs flicker green rapidly while the test is running. The test performs the following operations: 1. Sets all ports for parallel loopback. 2. Creates a frame F of maximum data size (2,112 bytes). 3. Transmits the frame F through port N. 4. Picks up the frame from the same port N. 5. Checks the eight statistic error counters for nonzero values: ENC_in, CRC_err, TruncFrm, FrmTooLong, BadEOF, Enc_out, BadOrdSet, DiscC3 6. Checks whether the transmit, receive, or class 3 receiver counters are stuck at some value. 7. Checks whether the number of frames transmitted is not equal to the number of frames received. 8. Repeats Steps 2 through 7 for all ports until one of the following conditions are met: a. The number of frames (or passcount) requested is reached. b. All ports are marked bad. At each pass, the frame is created from a different data type. 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, .... Note The execution of this command is subject to Admin Domain restrictions that may be in place. Refer to chapter 1, "Understanding Admin Domain Restrictions" and Appendix A, "Command Availability" for details. 504 Fabric OS Command Reference 53-1000599-02