FreeBSD Networking
From Exterior Memory
To start a interface (this will start whatever is configured in rc.conf, like a DHCP client):
service netif start em0
To bring down a interface (this will remove routes, etc.):
service netif stop em0
(service netif simply calls /etc/rc.d/netif)
To simply bring an interface up or down without any changes to the routing table, ifconfig em0 start or ifconfig em0 stop suffices.
