def _set_sip_ipv4_address(self, v, load=False):
    """
    Setter method for sip_ipv4_address, mapped from YANG variable /rbridge_id/router/router_bgp/router_bgp_attributes/neighbor/neighbor_ips/neighbor_addr/update_source/sip_ipv4_address (sip-ipv4-address)
    If this variable is read-only (config: false) in the
    source YANG file, then _set_sip_ipv4_address is considered as a private
    method. Backends looking to populate this variable should
    do so via calling thisObj._set_sip_ipv4_address() directly.
    """
    if hasattr(v, "_utype"):
      v = v._utype(v)
    try:
      t = YANGDynClass(v,base=RestrictedClassType(base_type=unicode, restriction_dict={'pattern': u'(([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])\\.){3}([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])(%[\\p{N}\\p{L}]+)?'}), is_leaf=True, yang_name="sip-ipv4-address", rest_name="sip-ipv4-address", parent=self, choice=(u'ch-update-source', u'ca-ipv4'), path_helper=self._path_helper, extmethods=self._extmethods, register_paths=True, extensions={u'tailf-common': {u'cli-drop-node-name': None}}, namespace='urn:brocade.com:mgmt:brocade-bgp', defining_module='brocade-bgp', yang_type='sip-ipv4-address', is_config=True)
    except (TypeError, ValueError):
      raise ValueError({
          'error-string': """sip_ipv4_address must be of a type compatible with sip-ipv4-address""",
          'defined-type': "brocade-bgp:sip-ipv4-address",
          'generated-type': """YANGDynClass(base=RestrictedClassType(base_type=unicode, restriction_dict={'pattern': u'(([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])\\.){3}([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])(%[\\p{N}\\p{L}]+)?'}), is_leaf=True, yang_name="sip-ipv4-address", rest_name="sip-ipv4-address", parent=self, choice=(u'ch-update-source', u'ca-ipv4'), path_helper=self._path_helper, extmethods=self._extmethods, register_paths=True, extensions={u'tailf-common': {u'cli-drop-node-name': None}}, namespace='urn:brocade.com:mgmt:brocade-bgp', defining_module='brocade-bgp', yang_type='sip-ipv4-address', is_config=True)""",
        })

    self.__sip_ipv4_address = t
    if hasattr(self, '_set'):
      self._set()