http://www.mikrotik.com/testdocs/ros/2. ... /pppoe.php
*My windows PPPoE client obtains IP address and default gateway from the MikroTik PPPoE server, but it cannot ping beyond the PPPoE server and use the Internet
*PPPoE server is not bridging the clients. Configure masquerading for the PPPoE client addresses, or make sure you have proper routing for the address space used by the clients, or you enable Proxy-ARP on the Ethernet interface
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http://wiki.mikrotik.com/wiki/PPPOE_Server
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I use public IPs for client so i don't need masquerading.
If any other manual is available will be very happy to look in to