HP StorageWorks 4/256 HP StorageWorks Fabric OS 5.3.x administrator guide (569 - Page 311
Correcting link failures, To determine if the negotiation was successfully completed
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Correcting link failures 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. If the switchShow command or LEDs indicate that the link has not come up properly, use one or more of the following procedures. To determine if the negotiation was successfully completed The port negotiates the link speed with the opposite side. The negotiation usually completes in 1-2 seconds; however, sometimes the speed negotiation fails. NOTE: Skip this procedure if the port speed is set to a static speed through the portCfgSpeed command. To determine if the negotiation was successfully completed 1. Enter the portCfgShow command to display the port speed settings of all the ports. 2. Enter the switchShow command to determine if the port has module light. 3. Determine whether or not the port at 1Gig/sec completes by entering the portCfgSpeed command. Then change the port speed to 2 Gig/sec. This should correct the negotiation by setting to one speed. 4. Enter the portLogShow or portLogDump command. 5. Check the events area of the output. The first example is 1 Gbit/sec and the second example is 2 Gbit/sec: 14:38:51.976 SPEE sn NC 00000001,00000000,00000001 14:39:39.227 SPEE sn NC 00000002,00000000,00000001 • sn indicates a speed negotiation. • NC indicates negotiation complete. • 01 or 02 indicate the speed that has been negotiated. • If these fields do not appear, proceed to the step 6. 6. Correct the negotiation by entering the portCfgSpeed [slotnumber/]portnumber, speed_level command if the fields in step 5 do not appear. To check for a loop initialization failure 1. Verify the port is an L_Port. a. Enter the switchShow command. b. Check the comment field of the output to verify that the switch port indicates an L_Port. If a loop device is connected to the switch, the switch port must be initialized as an L_Port. c. Check to ensure that the port state is online; otherwise, check for link failures. 2. Verify the loop initialization if the port is not an L_port. a. Enter the portLogShow or portLogDump command. b. Check argument number four for the LISA frame (0x11050100). switch:admin> portlogdumpport 4 time task event port cmd args 11:40:02.078 PORT Rx3 23 20 22000000,00000000,ffffffff,11050100 Received LISA frame The LISA frame indicates that the loop initialization is complete. Fabric OS 5.3.0 administrator guide 323
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