thanks for your comment. However when I change the LAN IP address, I remeber with the old firmware after a 'uci commit' and 'luci-reload' the the router was offline for a few seonds and the new LAN configuration was active (ping to new address worked). Now I have to reboot in order for the new network configuration to be active.
Another thing I noticed while configuring a RUT240 with the new firmware was, everytime I change the APN via uci command
uci set network.mob1s1a1=interface
uci set network.mob1s1a1.proto='wwan'
uci set network.mob1s1a1.modem='1-1'
uci set network.mob1s1a1.sim='1'
uci set network.mob1s1a1.pdp='1'
uci set network.mob1s1a1.method='nat'
uci set network.mob1s1a1.pdptype='ip'
uci set network.mob1s1a1.delegate='0'
uci set network.mob1s1a1.metric='2'
uci set network.mob1s1a1.auth='none'
uci set network.mob1s1a1.force_apn='-1'
uci set network.mob1s1a1.apn='new.apn.com'
after the reboot the config shows
wwan0 interface also is DOWN.
I have to turn on auto APN, save the configuration, and then change back to custom APN in order to make it work. After that wwan0 is UP again and mobile traffic establishes a connection.
You got any ideas?