Since upgrading to NSX 6.4, I get warnings for certain ESXi hosts because there is a VLAN and MTU mismatch. So I checked the vDS healthchecks and found the following error: VLAN 0 is not supported. But since we didn’t remove or add VLANs on the physical switches, I was very surprised. And VLAN 0 shouldn’t exist anyway. So, what is it about and why does the error suddenly occur?
Upgrading NIOC from version 2 to 3 is no big deal. But I’m writing this blog post because the official VMware documentation says that the upgrade to NIOC v3 is disruptive and that worried me.
We have only one dvSwitch in our virtual infrastructure and use vSAN and NSX. If this upgrade is really disruptive, we need to shut down all virtual machines before the upgrade process starts. And that would be a big deal for us and our customers.