Portloopbacktest - Brocade Communications Systems SN3000B Command Reference Manual

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portLoopbackTest

portLoopbackTest
Performs a functional test of port N->N path.
SYNOPSIS
portloopbacktest
[--slot slot]
[-nframes count]
[-lb_mode mode]
[-spd_mode mode]
[-ports itemlist]
ceeportloopbacktest
[--slot slot]
[-nframes count]
[-lb_mode mode]
[-spd_mode mode]
[-ports itemlist]
DESCRIPTION
Use this command to verify the functional operation of the switch.
The portLoopbackTest and ceePortLoopbackTest commands are platform-specific versions of the
same test. The portLoopbackTest command is supported on all Goldeneye2 and Condor-based
platforms. Use ceePortLoopbackTest on FCoE platforms only. On all other platforms, use
portLoopbackTest. Refer to the Fabric OS Troubleshooting and Diagnostics Guide, Appendix A, for a
table that correlates ASIC type with switch models.
This test sends frames from a given port's transmitter and loops them back into the same port's receiver.
The loopback is done at the parallel loopback path. The path traversed in this test does not include the
media or the fiber cable. Only one frame is transmitted and received at any given time. An external cable
is not required to run this test. The port LEDs flicker green rapidly while the test is running.
The test performs the following operations:
1.
2.
3.
4.
5.
6.
7.
8.
At each pass, the frame is created from a different data type of a palette of seven. 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:
754
Sets all ports for parallel loopback.
Creates a frame F of maximum data size (2,112 bytes).
Transmits the frame F through port N.
Picks up the frame from the same port N.
Checks if any of the following eight statistic error counters report nonzero values:
ENC_in, CRC_err, TruncFrm, FrmTooLong, BadEOF, Enc_out, BadOrdSet, DiscC3
Checks whether the transmit, receive, or class 3 receiver counters are stuck at some value.
Checks whether the number of frames transmitted is not equal to the number of frames received.
Repeats Steps two through seven for all ports until one of the following conditions is met:
a. The number of frames (or pass count) requested is reached.
b. All ports are marked bad.
Fabric OS Command Reference
53-1001764-01