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Fabric OS Reference
Telnet Commands
1
portLoopbackTest
Functional test of port N->N path.
Synopsis
portLoopbackTest [passCount]
Availability
admin
Description
Use this command to verify the functional operation of the switch by sending frames from the port
N transmitter, and looping the frames back into the same port N receiver. The loopback is done at
the parallel loopback path. The path exercised in this test does not include the GBIC nor the fiber
cable.
Only one frame is transmitted and received at any one time. No external cable is required to run this
test. The port LEDs flicker green rapidly while the test is running.
Below is the test method:
1.
Set all ports for parallel loopback.
2.
Create a frame F of maximum data size (2112 bytes).
3.
Transmit frame F through port N.
4.
Pick up the frame from the same port N.
5.
Check the 8 statistic error counters for nonzero values:
ENC_in, CRC_err, TruncFrm, FrmTooLong, BadEOF, Enc_out, BadOrdSet,
DiscC3
6.
Check if the transmit, receive or class 3 receiver counters are stuck at some value.
7.
Check if the number of frames transmitted is not equal to the number of frames received.
8.
Repeat steps 2 through 7 for all ports present until:
- The number of frames (or
passCount
) requested is reached.
- All ports are marked bad.
At each pass, the frame is created from a different data type. If seven passes are requested, seven
different data types are used in the test. If eight passes are requested, the first seven frames use
unique data types, and the eighth is the same as the first. The seven data types are:
1.
CSPAT
:
0x7e, 0x7e, 0x7e, 0x7e, ...
2.
BYTE_LFSR
:
0x69, 0x01, 0x02, 0x05, ...
3.
CHALF_SQ
:
0x4a, 0x4a, 0x4a, 0x4a, ...
4.
QUAD_NOT
:
0x00, 0xff, 0x00, 0xff, ...
5.
CQTR_SQ
:
0x78, 0x78, 0x78, 0x78, ...
6.
CRPAT
:
0xbc, 0xbc, 0x23, 0x47, ...
7.
RANDOM
:
0x25, 0x7f, 0x6e, 0x9a, ...
Because this test does not include the GBIC and the fiber cable in its test path, use the results from
this test in conjunction with the results from crossPortTest and spinSilk test to determine those
switch components that 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 ...