# uname -a
FreeBSD server.mydomain 10.2-RELEASE-p6 FreeBSD 10.2-RELEASE-p6 #0: Fri Oct 30 11:26:14 COT 2015 root@server.mydomain:/usr/obj/usr/src/sys/MYKERNEL amd64
# /etc/rc.d/pf restart
Disabling pf.
Enabling pfpfctl: igb0: driver does not support altq
.
root@server:~ # pfctl -f /etc/pf.conf
pfctl: igb0: driver does not support altq
define IGB_LEGACY
and where to implement it
vi /usr/src/sys/modules/igb/Makefile
uncomment
CFLAGS += -DIGB_LEGACY_TX
vi /boot/loader.conf
if_igb_load="YES"