Re: [PATCH v2] network: add rule to nftables backend that zeroes checksum of DHCP responses
On Tue, Oct 29, 2024 at 12:46:55PM +0000, Daniel P. Berrangé wrote:
A key difference that is probably relevant is that netbsd is
using an e1000 NIC in QEMU, while openbsd is using a virtio-net
NIC. At least when created by virt-manager.
AFAIR, QEMU's magic checksum offload only happens for virtio-net,
so presumably our rules are incompatible with non-virtio-net NICs
in someway.
Yes, that's it! The GNU/Hurd and Haiku guests are also using e1000,
since virtio drivers are not available there; moreover, if I switch a
random Linux guest from virtio-net to e1000 I can reproduce the issue
there as well.
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Andrea Bolognani / Red Hat / Virtualization