Comments on: FreeBSD VLAN Configuration

By: Robin Garen Aaberg

Robin Garen Aaberg — Fri, 27 Jan 2012 11:26:37 +0000

Hei Macs R we.
VPN and Vlans are different concepts. VLAN is virtual LAN, or virtual broadcast domains. If you have a switch with some ports on vlan 1 and others on vlan 2 that setup is equivalent to having two physical switches.

VPN is Virtual Private Network, and is a tunneling concept that lets you be in a network through another network. All encrypted so it wont be eavesdropped. To look for vpn configuration on free BSD, search for VPN or virtual Private Network. Not Vlan.

Best regards
Robin
Communica (http://komsys.org)

By: Corebug

Corebug — Mon, 14 Mar 2011 11:31:14 +0000

It’s also possible to do so in rc.conf:

cloned_interfaces=” vlan666 ”
ifconfig_vlan2551=”inet 172.16.0.1/30 vlan 666 vlandev em0 name SOME-VLAN-NAME”

And it really helps to understand which vlan is connected to what.

By: Vivek Gite

Vivek Gite — Sun, 21 Jun 2009 15:53:36 +0000

@Ted ,

Thanks for the heads-up.

By: Ted

Ted — Sat, 18 Apr 2009 18:02:15 +0000

Just a heads up – there’s a minor typo – on the second line, you’re missing a space between vlan and 5
ifconfig vlan5 10.0.0.1 netmask 255.255.255.0 vlan5 vlandev em0
should be
ifconfig vlan5 10.0.0.1 netmask 255.255.255.0 vlan 5 vlandev em0

By: Macs R We

Macs R We — Sun, 15 Feb 2009 01:59:53 +0000

Having tried these commands, it appears that what they achieve is to configure a VLAN server connection (if that is an accurate term). I came here hoping to find a shell command set that would let me connect to an existing external VLAN a a client — in other words, the command-line equivalent of defining a “VPN (PPTP)” connection in Internet Connect and connecting to it. Background: I monitor a WISP LAN from off the physical LAN, using a VPN connection to gain access to the LAN IP addresses. I need to have the VPN automatically connected at startup, plus devise a watchdog that will re-establish it when it drops. For that, I need the shell-command equivalent of the “Connect” button in Internet Connect.