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Fabric OS Reference
Telnet Commands
1
LoopBack Mode
There are four loopback modes that can be used when executing the spinSilk command. The modes
are specified by entering:
•
0 for cable mode. This loopback mode is the default mode and tests only
M->N
connections. It
requires that the user connect a cable from one port to a different port.
•
1 for singleportalso loopback mode. This lb_mode tests
M->N
and
M->M
connections.
If
M->N
cable connections are used the spinsilk command operates identically in lb_mode 0
and lb_mode 1.
If
M->M
loopback plugs are used with SPLB mode disabled the spinsilk command will
circulate frames between pairs of
M->M
connected ports as follows:
P1 TX >>> P1 RX -> P2 TX >>> P2 RX -> P1 TX
where:
>>>
is a cable or internal loop-back
->
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.
Refer to the setSplbmode command for more information on how the loopback mode setting
changes the execution of this command.
GBIC Mode
If the spinSilk command is executed with GBIC mode activated, only ports containing GBICs are
tested. To activate GBIC mode, execute the following command prior to executing the spinSilk
command:
switch:admin> setGbicMode 1
The state of the GBIC mode is saved in flash and remains active over a reboot until it is disabled as
follows:
switch:admin> setGbicMode 0
Prior to running this command make sure you disable the switch, set the GBIC mode to 1, and
install loopback cables on all SFP ports you want to test.
Because this test includes the GBIC and the fiber cable in its test path, use the results from this test
in conjunction with the results from crossPortTest and portLoopbackTest to determine those
switch components are not functioning properly.
Summary of Contents for StorageWorks 8B - FC Entry Switch
Page 1: ...reference manual version 3 0 fabric os www hp com ...
Page 14: ...xiv Fabric OS Reference ...
Page 189: ...Fabric OS Reference 1 175 Telnet Commands 1 portCfgLongDistance portCfgTrunkport portCfgSpeed ...
Page 302: ...1 288 Fabric OS Reference Telnet Commands 1 ...
Page 342: ...Index 4 Fabric OS Reference ...