how to enable "selfheal" on replicated volumes?

[weber at zackbummfertig.de (Marko Weber)]

Hello,
i did a replicated volume with 2 server.
when i take down server2 and fire up server2 again,
the gluster peer status shows, not connected for the 2nd server.

do i have to enable any special, for activiating selfheal?

thanks

marko