Users Guide

A–Troubleshooting
Troubleshooting with a Diagnostic Port (D_Port)
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When a switch port is enabled as a D_Port, the QLogic 2700 Series Adapter
automatically runs the basic diagnostic test at both ends of the link. The Brocade
switch then runs the following additional tests:
 Electric loopback test
 Optical loopback test
You should run diagnostic port tests on multipath configured boot from SAN or
fabric-assigned boot LUN. Running diagnostic port tests on single path boot from
SAN or fabric-assigned boot LUN may cause issues with OS stability in true boot
from SAN environments.
The following sections describe how to configure and run D_Port mode, and how
to verify D_Port mode from the QConvergeConsole utilities:
 Configuring D_Port on a Brocade Fibre Channel 16G or 32G Switch
 Configuring and Running Diagnostics Port on a Cisco Fibre Channel 16 or
32G Switch
 Checking D_Port Results from a Brocade Fibre Channel 16G or 32G Switch
 Verifying D_Port Mode with QConvergeConsole GUI
 Verifying D_Port Mode with Interactive QConvergeConsole CLI
 Verifying D_Port Mode with Noninteractive QConvergeConsole CLI
 Verifying D_Port Mode with QConvergeConsole Plug-ins
Configuring D_Port on a Brocade Fibre Channel 16G or 32G
Switch
To enable D_Port diagnostic mode:
From the Brocade Fibre Channel 16G or 32G switch, issue the following
commands:
# portdisable <port#>
# portcfgdport ––enable <port#>
# portenable <port#>
The D_Port test starts automatically.
NOTE
All QLogic-branded 32GFC SFP+ transceivers can run D_Port tests. If you
have a supported non-QLogic branded transceiver, ensure that it supports
the optical wrap (OWrap) and electrical wrap (EWrap) capability that is
required for D_Port.