Users Guide

Broadcom OCM-VM-LPe-UG124-101
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Emulex OneCommand Manager for VMware vCenter User Guide
12.3.7 Diagnostic Commands
The Diagnostic commands run diagnostics, including POST and loopback. Diagnostic commands also show and set
beaconing and run the D_Port diagnostic. (Not supported on LPe12000-series and LPe15000-series adapters.)
CAUTION! Using the loopback or POST test commands on an LPe12000-series adapter that is being used to boot from
SAN is not advisable. After the command has completed, the system performs an adapter reset, which can
cause a loss of connectivity to the SAN and possible loss of data. To perform these commands, you must make
sure that the adapter is not currently being used to boot from SAN.
Do one of the following:
 Move the target adapter to a non-boot from SAN host.
 If the host with the target adapter is also hosting other boot from SAN adapters, perform a boot from SAN using
one of the other boot from SAN adapters. The target adapter can now be used.
12.3.7.1 D_Port
The D_Port diagnostic is also known as ClearLink. The D_Port diagnostic tests are run from the OneCommand Manager for
VMware vCenter CLI by specifying the D_Port command. D_Port is a diagnostic mode supported by Brocade switches for
adapters with D_Port support. D_Port is enabled by default. (D_Port is not supported on LPe12000-series adapters.)
D_Port tests detect physical cabling issues that can result in increased error rates and intermittent behavior. When activated,
D_Port tests include:
 Local electrical loopback
 Loopback to the remote optics
 Loopback from the remote port to the local optics
 A full device loopback test with data integrity checks
 An estimate of cable length (to validate that a proper buffering scheme is in place)
These tests allow a level of fault isolation to distinguish faults due to marginal cables, optics modules, and connector or optics
seating.
NOTE:
 Dynamic D_Port and FA-PWWN cannot be enabled simultaneously. If D_Port is enabled and you want to
enable FA-PWWN, you must first disable Dynamic D_Port. If FA-PWWN is enabled and you want to enable
Dynamic D_Port, you must first disable FA-PWWN.
 It is not possible to detect if the switch can run D_Port tests before running the tests. Therefore, a test failure
occurs if the D_Port command is run with a switch that does not support D_Port.
 To terminate tests while they are running, type <CTL> + <C>. In this case, no results are given.
 If the overall test result is FAILED, you must rerun the tests successfully or reset the HBA port to bring the link
back up. A message is displayed instructing you to perform one of these actions if the overall test result is
FAILED.
 If a test phase fails, the D_Port tests are automatically stopped. In this case, some of the phases might not be
reported in the results. However, the failed phase is reported.
 More than one error can be reported. In this case, multiple lines are displayed for the test phase showing each
error.
Example
elxvcpcmd.exe v=10.192.000.000 u=root p=password d_Port WWPN