IBM 2109 Service Guide - Page 125

until you press Enter again. If the test does not find an error, there is no output. - serial

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on each port back to the receiver on the same port by way of an internal hardware loopback. It tests the switch circuitry up to the serial output of the ASIC. The loopback point chosen by the portLoopbackTest depends on what kind of GBIC module is present. If a GBIC other than an optical SWL or LWL GBIC is present, the test loops back only at the input (rather than the output) of the serial link. Copper and unknown GBIC types fall within this category. The command syntax is. portLoopbackTest nFrames Attention: This command cannot be performed on an operational switch. Before issuing the portLoopbackTest command, disable the switch by using the switchDisable command. If you do not include the nFrames parameter, the loopback test runs continuously until you press Enter again. If the test does not find an error, there is no output. You can choose to continue the test, view statistics, or view an error log. Table 35 explains the loopback errors message fields. While the test is running, all interface module front panel LEDs rapidly flicker green, indicating that the test is finding no errors and is processing. switch:admin> portLoopback Test Running Port Loopback Test .... Diags: (Q)uit, (C)ontinue, (S)tats, (L)og: s Diagnostics Status: Sun Jan 1 00:00:00 2000 port#: 0 1 2 3 4 5 diags: OK OK OK OK OK OK state: UP UP UP UP UP UP lm0: lm1: lm2 lm3 lm4 lm5 lm6 lm7 4654 frTx 4654 frRx 0 4654 frTx 4654 frRx 0 4654 frTx 4654 frRx 0 4654 frTx 4654 frRx 0 4654 frTx 4654 frRx 0 4654 frTx 4654 frRx 0 4654 frTx 4654 frRx 0 4654 frTx 4654 frRx 0 Central Memory OK Total Diag Frames Tx: 38032 Total Diag Frames Rx: 39232 Diags: (Q)uit, (C)ontinue, (S)tats, (L)og: q aborted 6 7 OK OK UP UP LLI_errs. LLI_errs. LLI_errs. LLI_errs. LLI_errs. LLI_errs. LLI_errs. LLI_errs. Figure 55. portLoopbackTest command example Table 35. portLoopbackTest command field descriptions Field Description Diagnostics Status The title header displays the time the diagShow command was performed. port# The port number. diags The current diagnostic status of the port. Possible values include OK, BAD. Appendix B. Diagnostics 109

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on each port back to the receiver on the same port by way of an internal hardware
loopback. It tests the switch circuitry up to the serial output of the ASIC.
The loopback point chosen by the portLoopbackTest depends on what kind of GBIC
module is present. If a GBIC other than an optical SWL or LWL GBIC is present,
the test loops back only at the input (rather than the output) of the serial link.
Copper and unknown GBIC types fall within this category.
The command syntax is.
portLoopbackTest nFrames
Attention:
This command cannot be performed on an operational switch. Before
issuing the
portLoopbackTest
command, disable the switch by using the
switchDisable
command.
If you do not include the nFrames parameter, the loopback test runs continuously
until you press Enter again. If the test does not find an error, there is no output. You
can choose to continue the test, view statistics, or view an error log. Table 35
explains the loopback errors message fields.
While the test is running, all interface module front panel LEDs rapidly flicker green,
indicating that the test is finding no errors and is processing.
Table 35. portLoopbackTest command field descriptions
Field
Description
Diagnostics Status
The title header displays the time the
diagShow
command was
performed.
port#
The port number.
diags
The current diagnostic status of the port.
Possible values include
OK
,
BAD
.
switch:admin> portLoopback Test
Running Port Loopback Test
....
Diags:
(Q)uit,
(C)ontinue,
(S)tats,
(L)og:
s
Diagnostics Status:
Sun
Jan
1
00:00:00 2000
port#:
0
1
2
3
4
5
6
7
diags:
OK
OK
OK
OK
OK
OK
OK
OK
state:
UP
UP
UP
UP
UP
UP
UP
UP
lm0:
lm1:
lm2
lm3
lm4
lm5
lm6
lm7
4654
frTx
4654
frTx
4654
frTx
4654
frTx
4654
frTx
4654
frTx
4654
frTx
4654
frTx
4654
frRx
4654
frRx
4654
frRx
4654
frRx
4654
frRx
4654
frRx
4654
frRx
4654
frRx
0
0
0
0
0
0
0
0
LLI_errs.
LLI_errs.
LLI_errs.
LLI_errs.
LLI_errs.
LLI_errs.
LLI_errs.
LLI_errs.
Central Memory OK
Total Diag Frames Tx:
38032
Total Diag Frames Rx:
39232
Diags:
(Q)uit,
(C)ontinue,
(S)tats,
(L)og: q
aborted
Figure 55. portLoopbackTest command example
Appendix B. Diagnostics
109