Did you ever found a solution to this particular problem???
I have exctlly the same problem in 3 of 4 VM servers. The 3 servers that do not report are running 3.0.1,32039 but the newest one,is running 3.0.1 89840. This is the only difference I can found between them and in the last I can get data of all the vmnicx interfaces. Unlike the other 3 machines. I only get statistics on vswif0 (the management virtual switch).
maybe you should raise a support request? I can monitor the virtual nics on our Orion install and see utilization so maybe theres something wrong with yours?
Thought I would update this post with an answare to this issue. It has to do with the Updates apply to the ESX server . We are running 4 servers and they all have ver. 3.0.1 but with different levels of patches. Those that are patch up to 32039 are not showing any activity on the NIC and the performance graphs show incorrectly. While servers running 77862 or newer are work fine.
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