hello, can I have two interface bonding together through a ip to reach, so double bandwidth.

You can bond together physical interfaces or EoIP interfaces.

but how to do tha?
None of the tutorialis is working, I tried a lot of them.
My isp support MLPPP and I have MT routerOS v2.9.7

So? Is there any working tutorial ?

MLPPP is not supported in V2.9. Please upgrade to V3.

-Louis

Do I need new license for upgrading ?

In Winbox you can go to 'System --> License' to find out what you can upgrade to.

Here is some info on how to upgrade.
http://wiki.mikrotik.com/wiki/Upgrading_RouterOS

-Louis

If you purchased that license, you can upgrade for free with Netinstall