'Merge vlan.'

def merge_vlan(self, vlan_id, name, description):

    conf_str = None
    if ((not name) and description):
        conf_str = (CE_NC_MERGE_VLAN_DES % (vlan_id, description))
    if ((not description) and name):
        conf_str = (CE_NC_MERGE_VLAN_NAME % (vlan_id, name))
    if (description and name):
        conf_str = (CE_NC_MERGE_VLAN % (vlan_id, name, description))
    if (not conf_str):
        return
    recv_xml = set_nc_config(self.module, conf_str)
    self.check_response(recv_xml, 'MERGE_VLAN')
    self.changed = True
