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ybpants
Contributor

CUCM VM Network Adapter: VMXNET3 or Flexible

I just upgraded my CUCM server from 10.5 to 11 and as part of that I ran through the process to switch the network adapter to VMXNET3 as defined in the release notes. using the following commands.

1.copy CUCMServer.vmx temp_file.vmx
2.findstr /V /R "^ethernet0.virtualDev.*" temp_file.vmx > CUCMServer.vmx
3.echo ethernet0.virtualDev = "vmxnet3" >> CUCMServer.vmx

Before the change my network adapter was set to "flexible" and I still see flexible as the Adapter Type even though the line ethernet0.virtualDev = "vmxnet3" is now present in the running .vmx file

The process for changing the adapter type in IM&P was to:

1. Copy the current MAC address
2. Delete the Network adapter
3. Add the new adapter with vmxnet3 as the type
4. Manually update the MAC with the old MAC address

When I look at the VM setting for the IM&P server I do see the adapter type as VMXNET3.

Am I missing something with the CUCM servers and will the flexible type cause me problems at some point in the future?

thanks

3 REPLIES 3
Jaime Valencia
Hall of Fame Cisco Employee

Did you remove the VM from ESXi and then registered it again???

That's explained in the instructions.

http://docwiki.cisco.com/wiki/CUCM_Upgrades_and_Migrations_FAQ#How_to_change_the_vNIC_to_VMXNET3.3F.3F

Step 9 thru 14.

HTH

java

if this helps, please rate

Jaime,

thanks for the response.  Yes, I did remove the VM from the host inventory and re-add it but still no luck.

I think i will try are re-apply the VMX file update and see if that helps

I just experienced the same problem and the vCenter Web Client turned out to be the culprit. It wasn't overwriting the VMX file even though it stated the file was uploaded successfully. I reverted to the legacy vSphere Infrastructure Client and the process worked as documented.

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