I brought a DELL vep 1445, it has intel i350 and x553 eth controllers, x553 extends 2 sfp+ ports. I intended to install esxi8.0u3 and CHR on it to serve as my home router. I have run the same configuration on a N100 box for over a year.

To simply the issue I'm facing, I can reproduce this issue in a simple setup

Passthrough the sfp+ ports of x553 to CHR(v7.14.2), connect one of the sfp+ to my desktop(x520) via Mellanox 10G DAC. It works as expected without VLAN.

However, when I started to configure VLAN tagging, this sfp+ port was going crazy.

Setting VLAN tagging on this sfp+ port(ether5) Enable VLAN filtering Then the x520 nic on my desktop started flopping, every 20-30s

Even restarting CHR doesn't help, and it's even worse, the ports on x553 are gone
Before restarting CHR After restarting CHR The only way to recover from this mess is restarting Esxi.

Please help.

Maybe related, maybe not:
viewtopic.php?t=208061
TLDR; Don't use VLAN 1

Maybe related, maybe not:
viewtopic.php?t=208061
TLDR; Don't use VLAN 1

Thanks for your reply. I guess the issue is with the NIC.

Now I get this workaround, instead of pass-through the x553 nic, I did the following

CHR(VMXNET3)<--> port group(VLAN ID:4095) <--> vswitch(uplink x553 sfp+)

I have ran btest on this setup for hours, and it looks stable. The CPU usage is better than I expected, VMXNET3 won't eat all the CPU even on 10Gbps.