What is the issue with e1000 that you are facing ?
Well, the VMs had e1000 adapters, but after we upgraded the compatibility (vHardware) and vmtools the e1000 changed to AMD Lance PCNET32.. and you only see this when logged onto the host, the view via vCenter shows the adapter is "Flexible"..
The VMs were hanging after booting up after the above change. we have been changing the adapter to VMXNET3.
We want to understand this better. These upgrades shouldn't be affecting our environment as such. We have 1000 plus VMs with over a dozen flavors of Linux running and managing this environment when these issues start popping up is no joke.
I have been working with VMware and have upgraded countless environments over the years, and lately it seems its all gone to crap..