[Bug 165059] vtnet(4): Networking breaks with a router using virtio net driver on KVM host

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=165059

Tristin Stagg <tristinstagg@protonmail.com> changed:

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--- Comment #29 from Tristin Stagg <tristinstagg@protonmail.com> ---
(In reply to elico from comment #28)

Hello,

I created a FreeBSD 13.1 STABLE virtual router in a Proxmox 7.1 testing
environment and was encountering this issue with my FreeBSD VM. I can confirm
that running the following helped me to resolve the issue:

ifconfig vtnet0 -rxcsum
ifconfig vtnet1 -rxcsum

Thank you for helping with my virtual router's NAT not working. 

Previous to resolution, I was able to ping things, which tells me that ICMP was
working fine (I could also see this in my pflogging) - however, I could not say
the same for TCP

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