Kernel configuration

Hello,
T2 can merge my own kernel configuration settings with the default setting of 
T2.
Therefore i can add my own rules in the experts chapter of the T2's 
configuration menu.
I need "802.1d Ethernet Bridging". Do i have to add exactly this string or 
where can i find 
any documentation about that (all kernel config HOWTOs assume that a standard 
config tool is used). 

Yours,

Hansjoerg