HP StorageWorks 2/16V Brocade Fabric OS Command Reference Manual (53-1000240-0 - Page 640

2 Note: Enter commands in lowercase only; mixed case is for readability. setSplbMode setSplbMode Sets or displays single port loopback (SPLB) mode. Synopsis setsplbmode [mode | -show] Description Use this command to enable MFG mode if mode is a nonzero, and disable SPLB mode if mode is 0. The mode is saved in flash memory and stays in that mode until the next execution of setSplbMode. The mode becomes active as soon as this command is executed. It does not require a reboot to take effect. The SPLB mode, when enabled, forces the spinSilk command to disable two-port loopback for M->M connected ports. This might be useful to isolate internal switch problems from SFP problems since the internal paths are used much less with SPLB mode enabled. Disabling SPLB mode, forces the spinSilk command to circulate frames between pairs of M->M connected ports as follows: P1 TX >>> P1 RX -> P2 TX >>> P2 RX -> P1 TX >>> is a cable or internal loopback . -> is a routing table entry. The connections between pairs of M->M ports are chosen to exercise the connections between as many chips (or Bloom quadrants) as possible, subject to the setting of allow_intra_chip and the availability of pairs of M->M ports. Any ports that are cross-cabled are routed to each other in the normal manner, regardless of the setting of SPLB mode: P1 TX >>> P2 RX -> P1 TX P2 TX >>> P1 RX -> P2 TX Note You can issue this command on the FR4-18i blade in a SilkWorm chassis; however, the command is not supported by the SilkWorm platform and does not effect any other feature operations. This availability is offered to maintain consistency across a mixed-blade environment. Note The execution of this command is subject to Admin Domain restrictions that may be in place. Operands Examples This command has the following operands: mode Specify 1 to enable SPLB mode or 0 to disable SPLB mode. If no mode is specified, the current value is displayed. This operand is optional; if omitted, the command displays the current setting. -show Specify the -show operand to display the current setting. This operand is optional. To enable or disable a two-port loopback: switch:admin> setsplbmode -show Splb Mode is 0 (Disabled) See Also spinSilk 2-606 Fabric OS Command Reference Manual Publication Number: 53-1000240-01