Cna problems – Dell Brocade Adapters User Manual
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Brocade Adapters Troubleshooting Guide
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CNA problems
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CNA problems
This section provides information for resolving problems more specific to functions of CNAs or
Fabric Adapter ports configured in CNA mode. For additional information on troubleshooting
problems on mezzanine card and expansion card adapters, refer to
Cannot manage CNAs after attempting upgrade to 3.0 drivers
On Windows 2003 systems with both HBAs and CNAs installed, BCU and the HCM Agent cannot
manage the CNA adapter. This occurs after attempting to upgrade to 3.0 drivers. Since network
drivers are not supported on Windows 2003 platforms for version 3.0, only storage drivers install.
The upgrade fails with an error message.
If you have specified the same installation location as the previous driver, entering BCU commands
will result in the following message. In addition, CNA adapters may disappear from HCM
application.
WARNING: BCU and Driver versions don't match!!!
Possible Cause: The 3.0 driver package was extracted to the same folder used for the previous
driver version. If this occurs, all the binaries prior to version 3.0 will be replaced by the 3.0 binaries.
Action: To avoid this problem before upgrade, extract the 3.0 driver package to a different location
than used for the previous driver package. If you have upgraded and the problem exists, extract the
older driver package (prior to version 3.0). This restores the binaries and BCU and HCM should
work as expected.
VMQs not created for virtual network adapter instances
Virtual Machine Queue (VMQ) support is enabled on the adapter and Virtual Network optimization
is enabled in properties for the virtual machine (VM). When VM is started, the BCU vnic -query
display command does not confirm VMQ creation.
Possible causes:
1. The shared memory resources reserved for VQM creation is insufficient to support the number
of Virtual Machines.
2. VMQ is disabled on the management operating system.
Actions:
1. Try changing the jumbo packet size to a smaller value or configure less receive buffers.
2. Create a sub-key "TenGigVmqEnabled" under the registry hive
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\VMSMP\Parameters on the
management operation system.
NOTE
Note that VMQ support is only available on systems running windows Server 2008 R2.