I had a firewall box on Solarix 10 x86. which was working fine when
connected to DSL modem (nat mode). I configured the DSL modem to Bridge
mode so that I can give Static IP to firewall box.

But since I am using static IP to firewall box, the box is not able to
route packets. ISP support person told me that I have to use PPPOE to
use the static IP configured with bridge.

could you please put some light on it?

thanks in advance,