What is the correct way of configuring virtual LAN interfaces (hopefully without messing up Network Manager) on Ubuntu 12.04 Desktop?
Simply adding the interface to /etc/network/interfaces seems to cause Network Manager some confusion:
auto vlan500
iface vlan500 inet static
...
...
vlan_raw_device eth1
Is there a better way of doing it?
update:
I updated /etc/NetworkManager/NetworkManager.conf with a no-auto-default clause, and set managed=false in the [ifupdown] section:
[main]
plugins=ifupdown,keyfile
dns=dnsmasq
no-auto-default=6C:FD:12:34:56:78,
[ifupdown]
managed=false
This keeps NetworkManager from firing up eth0, and makes it stay away from eth1 and it's VLAN interfaces. Previously it would only let a single VLAN interface be up, and it would put the static IP of that VLAN interface directly on the eth1 physical interface.
Still, there is a 2 minute delay during boot as (I presume) NetworkManager is trying to work out the network configuration.
Solution:
Solved by creating keyfiles as described in my answer below. My desktop now boots with all VLAN interfaces up and running, and without any delays during boot.
