HP StorageWorks MSA 2/8 - SAN Switch Reference Manual page 778

Fabric OS Commands
See the setSplbmode command for more information on how the loopback
mode setting changes the execution of this command.
GBIC/SFP Mode (sfpmode): V3.1.x
If the spinSilk command is executed with SFP mode activated, only ports
containing SFPs are tested. To activate SFP mode, execute the following
command prior to executing the spinSilk command:
The state of the SFP mode is saved in non-volatile memory and remains active
over a reboot until it is disabled as follows:
An example mode of operation would be to disable the switch, set the SFP mode
to 1, and execute spinsilk which would limit its testing to ports which are
using SFPs, and all SFP ports that are properly cable loopbacked.
Because this test includes the
results from this test in conjunction with the results
can be used
properly.
778
where:
>>> 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 ASICs as possible subject to the availability of
pairs of M->M ports.
In mode 1 with SPLB mode disabled the spinsilk command only
circulates frames within each single port and none of the ASIC to ASIC
connections are tested. This mode should only be used for fault isolation.
2 for external loopback mode. The external loopback test creates a test loop
between two ports on different ASICs and also tests the Serializer Deserializer
functionality.
5 for internal loopback mode. The internal loopback test creates a test loop
between two ports on a single ASIC.
switch:admin> setgbicmode 1
switch:admin> setgbicmode 0
to determine those switch components that are not functioning
SFPs
and the fiber cable in its test path, use the
Fabric OS Version 3.1.x/4.1.x Reference Guide
of the
portloopbacktest