pppoe connection configured on MA5200g and it's working properly ,means user pass the authentication and get the ip address from BRAS but they can not visit web page on internet
by check the configuration ,we see it use the Ethernet 0/0/0 for uplink and Gigaethernet1/0/0 for downlink ,according to the operational manual E0/0/0 on SMU board is just for management operation and it's not to use for any other operaton I changed the uplink to Gigaethernet 1/0/1 and the problem were solved.
1.check MA5200G use the last VRP patch version by input "disp patch info" command ;
2.check the PC and MA5200G to don't block port 80 by ACL or firewall;
3. check the configuration if it was ok ,if you use nat function check it is working well;