FreeBSD - Setup Link Aggregation ( LAGG ) in failover mode

To load drivers on boot you need to add this to /boot/loader.conf

if_lagg_load=”YES”

Then add to rc.conf

ifconfig_em0=”UP”
ifconfig_em1=”UP”
cloned_interfaces=”lagg0″
ifconfig_lagg0=”laggproto failover laggport em0 laggport em1 ip.ad.dr.ess netmask net.ma.sk”

probably good idea to turn on spanning tree on your port .