Analyzing Connection Problems - HP AE370A - Brocade 4Gb SAN Switch 4/12 Administrator's Manual

Use the following steps to retrieve as much of the following informational items as possible prior to
contacting HP.
1. Switch information:
• Serial number (located on the chassis)
• World Wide Name (obtain using licenseIdShow or wwn commands)
• Fabric OS version (obtain using the version command)
• Switch configuration settings
• supportSave output
• pdShow and saveCore output
2. Host information:
• OS version and patch level
• HBA type
• HBA firmware version
• HBA driver version
• Configuration settings
3. Storage information:
• Disk/tape type
• Disk/tape firmware level
• Controller type
• Controller firmware level
• Configuration settings
• Storage software (such as EMC Control Center, Veritas SPC, etc.)

Analyzing connection problems

If a host is unable to detect its target (for example, a storage or tape device), you should begin
troubleshooting the problem in the middle of the data path. Determine if the problem is above or below the
starting point, then continue to divide the suspected problem path in half until you can pinpoint the
problem.
To check the logical connection
1. Enter the switchShow command.
2. Review the output and determine if the device is logically connected to the switch:
• A device that is logically connected to the switch will be registered as an F_Port or L_Port.
• A device that is not logically connected to the switch will be registered as something other than an
F_Port or L_Port.
3. If the missing device is logically connected, proceed to the next troubleshooting procedure
the Name Server
4. If the missing device is not logically connected, check the device and everything on that side of the
data path. Also refer to
This includes all aspects of the host OS, the driver settings and binaries, the device Basic Input Output
System (BIOS) settings, the SFP, the cable going from the switch to the device, the SFP on the switch side
of that cable, and all switch settings related to the device. Refer to
failure" on page 297 as the next potential trouble spot.
To check for Fibre Channel connectivity problems
1. Enter the fcPing command, which:
• Checks the zoning configuration for the two ports specified.
• Generates an Extended Link Service (ELS) frame ECHO request to the source port specified and
validates the response.
• Generates an ELS ECHO request to the destination port specified and validates the response.
(NS)" on page 285.
"Correcting link failures" on page 297.
"To check for a loop initialization
Fabric OS 5.2.x administrator guide 283
("To check