Dell Brocade 825 Brocade Adapters Troubleshooting Guide - Page 68

I/O problem on connected FCoE device

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2 FCoE and Fibre Channel problems Action: Verify if the PWWN or NWWN has a zero value using one of these methods: • Windows system log or Linux /var/log/messages file displays a port error indicating a zero PWWN or NWWN. • Output from bcu port --query command for the port shows zero value for PWWN or NWWN. • Advanced Management Module (AMM) Open Fabric Manager (OFM) status page displays an error status for the corresponding port of the blade. If values are zero, use BOFM to configure non-zero values for the PWWN and NWWN. I/O problem on connected FCoE device NOTE This issue applies to CNAs and Fabric Adapter ports configured in CNA mode only. There is an I/O problem on a connected FCoE device. 1. Possible Cause: Link between the adapter and switch is down. Action: Refer to "FCoE link is down" on page 43. Action: Refer to "DCB is not enabled" on page 45. 2. Possible Cause: PFC (priority flow control), DCB Map, and FCoE Map is not configured correctly on the FCoE switch. Action: Verify configuration using the appropriate Fabric OS command on the attached switch. Refer to the Fabric OS Command Reference Manual for information. Action: Configure PFC using the appropriate Fabric OS command on the attached switch while in switch configuration mode. 3. Possible Cause: Zoning is configured incorrectly on FCoE switch. Action: Verify zoning configuration on the attached switch using the appropriate Fabric OS command. Refer to the Fabric OS Command Reference Manual for more information. 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 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). 44 Brocade Adapters Troubleshooting Guide 53-1002145-01

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44
Brocade Adapters Troubleshooting Guide
53-1002145-01
FCoE and Fibre Channel problems
2
Action:
Verify if the PWWN or NWWN has a zero value using one of these methods:
•
Windows system log or Linux /var/log/messages file displays a port error indicating a zero
PWWN or NWWN.
•
Output from
bcu port --query <port_id>
command for the port shows zero value for PWWN
or NWWN.
•
Advanced Management Module (AMM) Open Fabric Manager (OFM) status page displays
an error status for the corresponding port of the blade.
If values are zero, use BOFM to configure non-zero values for the PWWN and NWWN.
I/O problem on connected FCoE device
NOTE
This issue applies to CNAs and Fabric Adapter ports configured in CNA mode only.
There is an I/O problem on a connected FCoE device.
1.
Possible Cause:
Link between the adapter and switch is down.
Action:
Refer to
“FCoE link is down”
on page 43.
Action:
Refer to
“DCB is not enabled”
on page 45.
2.
Possible Cause:
PFC (priority flow control), DCB Map, and FCoE Map is not configured correctly
on the FCoE switch.
Action:
Verify configuration using the appropriate Fabric OS command on the attached switch.
Refer to the
Fabric OS Command Reference Manual
for information.
Action:
Configure PFC using the appropriate Fabric OS command on the attached switch while
in switch configuration mode.
3.
Possible Cause:
Zoning is configured incorrectly on FCoE switch.
Action:
Verify zoning configuration on the attached switch using the appropriate Fabric OS
command. Refer to the
Fabric OS Command Reference Manual
for more information.
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).