The VLAN mapping on the ARV4520PW board is the following:
port on Router: | VLAN in software:
LAN 1 | 3
LAN 2 | 2
LAN 3 | 1
LAN 4 | 0
DSL | 4
So LAN4 is not VLAN4 but VLAN0 (VLAN4 is DSL port) -> set "3 2 1 0 5t" as default switch config.
SVN-Revision: 31391