HP StorageWorks MSA 2/8 HP StorageWorks Fabric OS Procedures V3.1.x/4.1.x User - Page 229
Link Failure, Possible Causes for Link Failure, Switch State
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Troubleshooting 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 Online Offline Testing Faulty Action The state of the switch is ok. Move on to check the "Port's Physical State" on page 230. 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 HP StorageWorks Fabric OS Version 3.1.x/4.1.x Reference Guide for more information. Fabric OS Procedures Version 3.1.x/4.1.x User Guide 229