Dell Brocade G620 Brocade 8.0.1 Fabric OS Command Reference - Page 836

portLoopbackTest -lb_mode mode 1 2 5 7 8 -spd_mode mode 2 4 8 10 16 32 -ports itemlist 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. Port Loopback (loopback plugs) External (SERDES) loopback Internal (parallel) loopback. This parameter is not supported in 16 Gbps-capable platforms. Backend bypass & port loopback Backend bypass & SERDES loopback Specifies the speed mode for the test. This parameter controls the speed at which each port is operated. The speed option chosen or defaulted to must not exceed the speed capability of the SFP device or the test results will be unpredictable. For example, if you use an 8 Gbps SFP in a 16 Gbps-supported slot, you must use spd_mode 8 option to specify 8 Gbps speed. The speed modes 8, 10, 16, and 32 are supported in 32 Gbps-capable platforms. Runs test at 2 Gbps. Runs test at 4 Gbps. Runs test at 8 Gbps (Default for 8 Gbps platforms). Runs test at 10 Gbps (Default for 10 Gbps platforms). This speed mode is not supported on 16 Gbps core blades. Runs test at 16 Gbps (Default for 16 Gbps platforms). Runs test at 32 Gbps (Default for 32 Gbps platforms). This speed mode is not supported in 8 Gbps-capable and 16 Gbps-capable platforms. Specifies a list of blade ports to test. By default, all of the blade ports in the specified slot (--slot) are used. You must have root access to the bladePortMap command if you want to map a specific front-end blade port to a user port. You can also use the -uports option to specify the user ports. Refer to itemList for more information on the itemlist parameter. 812 Brocade Fabric OS Command Reference 53-1004112-02