Link Failure; Possible Causes For Link Failure; Switch State; Switchstate And Actions To Take - HP StorageWorks MSA 2/8 - SAN Switch User Manual

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

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
Online
Offline
Testing
Faulty
Fabric OS Procedures Version 3.1.x/4.1.x User Guide
Switch State, page 229
Port's Physical State,
Speed Negotiation Failure,
Link Initialization Failure
Port Has Come Up in a Wrong
The state of the switch is ok. Move on to check
the "Port's Physical
Enable the switch by entering the switchenable
command.
Wait for the switch to complete its test.
Check the condition of the switch. Enter the
switchStatusShow and errShow or
errDump commands and identify the
malfunctioning parts. Refer to the
StorageWorks Fabric OS Version 3.1.x/4.1.x
Reference Guide
page 230
page 230
page 231
(Loop),
page 232
Mode,
Action
State" on page 230.
for more information.
Troubleshooting
HP
229