An ISP in Norway, Altibox, serves up VLANs for VoIP, IPTV and internet. The included router gives no control or options for LAN management. I only use the internet service, so I replaced it with a generic router running OpenWRT. I found no straight forward answer to how to configure it, so here it is.

# The situation

    ,--.
  (      )                 +--------+
 (internet)    -> VLANs -> | router | -> LAN
/__________)               +--------+

AFAIK the VLANs used are:

• 100 - VoIP / router remote config
• 101 - IPTV
• 102 - internet

# How-to

These are the settings you need to change in OpenWRT.

Switch:

• change vlan 2 to 102
• change wan on vlan 102 to tagged

Save and apply

Interface:

• edit wan
• change device from eth0.2 to eth0.102
• repeat for wan6

Save and apply