HP StorageWorks 2/16V Brocade Fabric OS Command Reference Manual - Supporting - Page 544
set to 0 or 1, the following speed modes are available to test the speed negotiation
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2 portLoopbackTest --slot number Specify the slot number on which the diagnostic will operate. The ports specified will be relative to this slot number. The default is set to 0 and designed to operate on fixed-port-count products. -nframes count Specify the number of frames to send. The test will progress until the specified number of frames has been transmitted on each port. The default value is 10. -lb_mode mode Specify the loopback mode for the test. By default, this test uses internal loopback. Valid values are as follows: 1 Port Loopback (loopback plugs) 2 External (SERDES) loopback 5 Internal (parallel) loopback -spd_mode mode Specify the speed mode for the test. This parameter is used only with Bloom and Condor ASIC-based products, where it controls the speed at which each port is operated. For 1 Gbit/sec-only products, it is ignored. The exact operation of speed modes 5 through 8 depends upon the loopback mode selected. When speed modes 5 through 8 are used with cables, they must be connected even to odd or the test will fail. 0 Runs test at 1 Gbit/sec, 2 Gbit/sec, and 4 Gbit/sec. 1 Runs test at 1 Gbit/sec. 2 Runs test at 2 Gbit/sec (Bloom default). 4 Runs test at 4 Gbit/sec (Condor default). For lb_mode set to 0 or 1, the following speed modes are available to test the speed negotiation: 3 Set all even ports' speed for autonegotiate; set all odd ports' speed for 1 Gbit/sec. 4 Set all even ports' speed for autonegotiate; set all odd ports' speed for 2 Gbit/sec. 5 Set all odd ports' speed for autonegotiate; set all even ports' speed for 1 Gbit/sec. 6 Set all odd ports' speed for autonegotiate; set all even ports' speed for 2 Gbit/sec. For lb_mode set to 2 or 3, the following speed modes are available to test FIFO underrun. 3,5 Set all even ports' speed for 2 Gbit/sec; set all odd ports' speed for 1 Gbit/sec. 4,6 Set all even ports' speed for 1 Gbit/sec; set all odd ports' speed for 2 Gbit/sec. -ports itemlist Specify a list of blade ports to test. By default, all of the blade ports in the specified slot (--slot) are used. See itemList for more information. Examples To run a functional test of a connection: switch:admin> portloopbacktest -ports 1/10-1/20 -nframes 1 -lb_mode 1 Running Port Loopback Test .... passed. 512 Fabric OS Command Reference Manual 53-1000436-01