All:
I see that IFCAP_VLAN_MTU is available, but IFCAP_VLAN_HWTAGGING, as seen
in ti(4), is absent in em(4). Version 6.6.6 of em(4) elsewhere is
promising TOE (TCP Segment Offload) and already supports a "vlanhwtag" and
"jumbo frames".
For VLAN routing security boxes, this would be a big plus for a lot of
embedded SBCs that support only integrated Intel NICs.
Two such units that I've been loooking at:
http://www.nycbug.org/?NAV=dmesgd;f_dmesg=;f_bsd=;f_nick=;f_descr=;dmesgid=1913#1913
http://www.nycbug.org/?NAV=dmesgd;f_dmesg=;f_bsd=;f_nick=;f_descr=;dmesgid=1911#1911
l8*
-lava (Brian A. Seklecki - Pittsburgh, PA, USA)
http://www.spiritual-machines.org/