So far I got the PPPoE-relay function from OrenORT ( http://kamikaze.openwrt.org/8.09.2/brcm-2.4/packages/rp-pppoe-relay_3.10-1_mipsel.ipk )
and copy "usr/sbin/pppoe-relay" to JFFS
then execute "sleep 10 && /jffs/pppoe-relay -S vlan2 -C br0" in the initial to have the function implemented.
It's very convenient for users could have multi-IP to setup servers in LAN.
As in taiwan where most AP come from(OEM) many ISPs offer up to 7~8 dynamic IP and 1 fixed IP, if the function has been implemented natively would be convenient to most of the tomato's users here. And thank you very much^^