HP StorageWorks MSA 2.8 SAN Switch - Manual (Page 229)

Troubleshooting
229 Fabric OS Procedures Version 3.1.x/4.1.x User Guide
Link Failure
A link failure occurs when a server or storage is connected to a switch, but the link
between the server/storage and the switch does not come up. This prevents the
server/storage from communicating through the switch.
Possible Causes for Link Failure
If the switchshow command and/or the LED lights indicate that the link has
not come up properly, follow the steps for one or more of the areas indicated
below.
A link failure can be caused by one of the following reasons:
■ Switch State , page 229
■ Port’s Physical State ,
page 230
■ Speed Negotiation Failure ,
page 230
■ Link Initialization Failure (Loop) ,
page 231
■ Port Has Come Up in a Wrong Mode ,
page 232
Switch State
1. Enter the switchshow command.
2. Check the switchState entry in the switchshow command output.
3. Use the following list of switch states to determine the next step:
Table 19: SwitchState and Actions to Take
SwitchState Action
Online The state of the switch is ok. Move on to check
the “ Port’s Physical State ” on page 230.
Offline Enable the switch by entering the switchenable
command.
Testing Wait for the switch to complete its test.
Faulty Check the condition of the switch. Enter the
switchStatusShow
and
errShow
or
errDump
commands and identify the
malfunctioning parts. Refer to the HP
StorageWorks Fabric OS Version 3.1.x/4.1.x
Reference Guide for more information.