[SOLVED] Terribly tagged VLAN VM performance

[x86txt]

I have just started to deploy VLANs to some of my VMs and I'm seeing terrible performance to any VM that uses vlan tagging.

I can get 9Gbps from my workstation to the physical Proxmox host, but when I test to a VM running on that host using vlan tagging, I can't even hit 100Mbps.

I have a very simple Proxmox bridge and I simply enabled 'bridge vlan aware' to the host, then rebooted. Moving the VM to another physical Proxmox host results in the same sub 100Mbps performance.

If I remove the vlan tag, reboot the VM, and re-test - boom, 9+ Gbps.

It's not my vlan router as I have tested with other devices. I used to run all this under ESXi with multiple VLANs and had no speed issues either.

Any idea what in the world could be at play here?

edit: scratch this. After moving it back to the tagged vlan to run more testing, performance is back to where it should be.

edit 2: Nope now it's back to ~90Mbps with dips down into the 60's. What the heck?

edit 3: PEBKAC. Didn't realize my desktop had a wireless connection to the VLAN I was testing. Whoops. Ignore, all is well and very performant!

 

[Stoiko Ivanov]

Thanks for coming back and editing the thread to explain where the problem was!
This will certainly help others who also run into similar issues.