https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=230996

Lev A. Serebryakov <l...@freebsd.org> changed:

           What    |Removed                     |Added
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                 CC|                            |l...@freebsd.org

--- Comment #1 from Lev A. Serebryakov <l...@freebsd.org> ---
I have very similar problem: igb/I210, FreeBSD 12-ALPHA8 (r339009).
When I enable "vlanhwtag" on server, clients on this VLAN receive UDP with
broken checksums. 
For example, client can not obtain address via DHCP from server with enabled
"vlanhwtag", because DHCP client doesn't seen answers, because they are dropped
by kernel due to invalid checksum: tcpdump sees DHCPOFFER on cleint's interface
but dhclient doesn't receive anything.

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