Brocade Communications Systems BR-1020 Guía para resolver problemas descargar pdf (Pagina 46)

28 Brsocade Adapters Troubleshooting Guide

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FCoE and Fibre Channel problems

This section provides resolution of problems related to Fiber Channel and FCoE.

Loss of sync and loss of signal errors in port statistics

If the port is having loss of synchronization and signal errors, refer to the following descriptions of

possible causes and recommended actions to help resolve the problem. Learn more about

displaying port statistics in “Port statistics” on page 59.

Possible Cause: Possible physical link problem.

Action: Check authentication settings on the switch and adapter. For the switch, execute the

authutil --show Fabric Fabric OS command. For the adapter, execute the BCU auth --show command

(refer to “Authentication settings” on page 73).

Action: Use the BCU auth --show <port> command on the adapter and Fabric OS authutil --show

command on the switch.

Action: Check the shared secret configuration on the attached switch and on the adapter. For the

switch, execute the secAuthSecret Fabric OS command. For the adapter, execute the auth –-secret

BCU command. Refer to “Authentication settings” on page 73 for details on using the auth-secret

command.

Fabric authentication failures

If failures in the authentication process between the adapter in host system and the connected

switch occur, refer to the following descriptions of possible causes and recommended actions to

help resolve the problem.

Possible Cause: Authenticating configuration is incorrect.

Action: Check authentication settings on the switch and adapter. For the switch, execute the

authutil --show Fabric OS command. For the adapter, execute the BCU auth --show command (refer

to “Authentication settings” on page 73).

Action: Check the shared secret configuration on the attached switch and adapter. For the switch,

execute the secAuthSecret Fabric OS command. For the adapter, execute the auth –-secret BCU

command. Refer to “Authentication settings” on page 73 for details on using the auth-secret

command.

I/Os are not failing over immediately on path failure in MPIO setup

When multipath I/O (MPIO) is enabled and input/output operations are not failing over immediately

when a path failure occurs, refer to the following descriptions of possible causes and

recommended actions to help resolve the problem.

Possible Cause: Improper driver mpiomode setting.

Action: Execute the port --query <port_id> BCU command and ensure fcpim MPIO mode is enabled

(which implies zero Path TOV values) or that fcpim MPIO mode is disabled with the expected “Path

TOV” settings (default is 30 seconds).

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Brocade Communications Systems BR-1020 Guía para resolver problemas Pagina 46