HP StorageWorks MSA 2/8 - SAN Switch Reference Manual page 168

Fabric OS Commands
-lb_mode mode
(V4.1.x only)
-spd_mode mode
(V4.1.x only)
168
Select the loopback point for the test. By default,
crossporttest uses cable loopback as described
above. However for debug purposes you can select
other loopback modes as follows:
0 Cable Loopback.
1 Port Loopback (loopback plugs).
2 External (series) loopback.
3 Silkscreen loopback.
4 Serial link wrapback.
5 Internal (parallel) loopback.
Select the speed mode for the test. This parameter is
only used for 2-Gbps capable products where it
controls the speed at which each port is operated.
For 1-Gbps only products it is ignored. The exact
operation of modes 3-6 depends upon the loopback
mode selected. When speed modes 3-6 are used with
cables, they must be connected even to odd or the test
will fail.
0 - set all ports' speed for auto-negotiate
1 - set all ports' speed to lock at 1 Gbps
2 - set all port's speed to lock at 2 Gbps
For -lb_mode set to 0, one of the following speed
modes are available to test the speed negotiation:
3 - set all even ports speed for AN, set all odd ports
speed for 1 Gbps.
4 - set all even ports' speed for AN, set all odd ports'
speed for 2 Gbps.
5 - set all odd ports' speed for AN, set all even ports'
speed for 1 Gbps.
6 - set all odd ports' speed for AN, set all even ports'
speed for 2 Gbpsc.
For -lb_mode set to 2, the following speed modes are
available to test FIFO underrun:
3,5 - set all even ports' speed for 2 Gbps, set all odd
ports' speed for 1-Gbps.
4,6 - set all even ports' speed for 1 Gbps, set all odd
ports' speed for 2 Gbps
Fabric OS Version 3.1.x/4.1.x Reference Guide