====== Tagged Vlans on FreeBSD ======

===== On the Fly =====
<file bash>
ifconfig vlan_device.vlan_id create
</file>
<file bash>
ifconfig em0.247
</file>


===== Using rc.conf =====

The first thing to do is to list the VLANs that will be on the **em0** adapter:
<file /etc/rc.conf>
vlans_em0="101 102"
</file>

Be be to bring the parent interfaces up before you configure the IPv4 on the vlans
<file>
ifconig_em0="up"
</file>
This will cause FreeBSD to create new “virtual” network adapters called **lan0.101** and **lan0.102** – and these seem to function much like any other network card, you can use ifconfig on them.
Then, configure the actual addresses for the new virtual adapters:
<file /etc/rc.conf>
ifconfig_em0_101="inet 10.1.1.1/24"
ifconfig_em0_102="inet 10.1.2.1/24"
</file>

Now **reboot your system** or run **/etc/rc.d/netif restart** - you should now see something like this in your ifconfig output:
<file>
em0.101: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        ether 00:1b:b9:8b:ca:33
        inet 10.1.1.1 netmask 0xffffff00 broadcast 10.1.1.255
        inet6 fe80::210:b5ff:fe0d:9c75%lan0.101 prefixlen 64 scopeid 0x5
        nd6 options=3<PERFORMNUD,ACCEPT_RTADV>
        media: Ethernet autoselect (100baseTX <full-duplex,flowcontrol,rxpause,txpause>)
        status: active
        vlan: 101 parent interface: lan0
em0.102: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        ether 00:1b:b9:8b:ca:33
        inet 10.1.2.1 netmask 0xffffff00 broadcast 10.1.2.255
        inet6 fe80::210:b5ff:fe0d:9c75%lan0.102 prefixlen 64 scopeid 0x6
        nd6 options=3<PERFORMNUD,ACCEPT_RTADV>
        media: Ethernet autoselect (100baseTX <full-duplex,flowcontrol,rxpause,txpause>)
        status: active
        vlan: 102 parent interface: lan0
</file>