def _check_acl(self, acl_no, network, netmask):
exp_cfg_lines = ['<STR_LIT>' + str(acl_no),<EOL>'<STR_LIT>' + str(network) + '<STR_LIT:U+0020>' + str(netmask)]<EOL>ios_cfg = self._get_running_config()<EOL>parse = HTParser(ios_cfg)<EOL>acls_raw = parse.find_children(exp_cfg_lines[<NUM_LIT:0>])<EOL>if acls_raw:<EOL><INDENT>if exp_cfg_lines[<NUM_LIT:1>] in acls_raw:<EOL><INDENT>return True<EOL><DEDENT>LOG.error("<STR_LIT>", acl_no)<EOL>return False<EOL><DEDENT>LOG.debug("<STR_LIT>", acl_no)<EOL>return False<EOL>
Check a ACL config exists in the running config.

        :param acl_no: access control list (ACL) number
        :param network: network which this ACL permits
        :param netmask: netmask of the network
        :return: