'Call methods named \'_fdb_<action>\'.
This method assumes that methods \'_fdb_<action>\' are defined in class.
Currently the following actions are available.
chg_ip'

@log_helpers.log_method_call
def fdb_update(self, context, fdb_entries):

    for (action, values) in fdb_entries.items():
        method = ('_fdb_' + action)
        if (not hasattr(self, method)):
            raise NotImplementedError()
        getattr(self, method)(context, values)
