I've been using ESXi for years on a local server as a small private lab for training, mainly network-related stuff like firewalls. I've used the free edition without vSphere and central management - its good enough for my needs. I recently did a hardware upgrade and installed ESXi hypervisor 7.0U3 on the new machines and started installing a few new VMs on the new ESXi host, and pretty much immediately run into trouble with port groups.
Most of my VMs have multiple vNICs and I assign them to different port groups, usually tagging port groups with a VLAN ID, so traffic leaving the host will be tagged and flows though various other physical devices in the rack. But this seems to behave very weird now. MAC addresses does not show up on the right port group - but they might show up on other port groups used by other vNICs on the same VM. It seems a bit random. If a VM only has one vNIC it seems to always work. But when I use two or more this does not work. Even if the mac addresses seems to appear on the right port group no traffic goes though, and not a single packet is logged in the switch.
I've tried reinstalling VMs, changing Direct I/O settings for vNIC, remove/add vNIC and so on, but I get the same result every time - and I have no memory of ever having to deal with this before.
The hardware is a Cisco UCS C220 M4 server with Intel i350 4-port NIC.
Any tips on how to troubleshoot this are welcome!
Please see attached screen shots.
