code: def get_in_srvc_node_ip_addr(cls, tenant_id):
          
          if tenant_id not in cls.serv_obj_dict:
              LOG.error("Fabric not prepared for tenant %s", tenant_id)
              return
          tenant_obj = cls.serv_obj_dict.get(tenant_id)
          in_subnet_dict = tenant_obj.get_in_ip_addr()
          next_hop = str(netaddr.IPAddress(in_subnet_dict.get('subnet')) + 2)
          return next_hop
docs: Retrieves the IN service node IP address.