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: