## 4 Solution of Requirements and Inspection Methods  
### Open-Flow Proxy Construction  
Based on software-defined wide area network (SD-WAN) technologies in accordance with the service requisites elucidated in Figure 22 of this investigation, an apparatus conforming to the SD-WAN OpenFlow standard [36; 37; 38] has been deployed. Its principal function resides in orchestrating the metamorphosis of a data exchange framework. Concretely, it engaged in the judicious parallel processing of traffic data, which, upon ingression into the data convergence table scheduling, is overseen by an SD-WAN controller [39] predicated on the functionality intrinsic to traffic features delineated in the Flow/Group/Meter Table. Following this, the data emanate from the converter and, guided by the scrutiny of pertinent form functionalities, discern the egress port of the data flow packet or the modality corresponding to the disposition. Therefore, if traditional network infrastructure aspires toward SD-WAN optimization and OpenFlow protocol support, with absent alterations to the hardware framework, it becomes imperative to imbue the system software with functionalities pertinent to the data flow table (Flow/Group/Meter Table) and Packet-In. For instance, certain commercially available manufacturers of Wi-Fi access points or traditional switches may, through the incorporation of OpenWRT firmware or the integration of the open switch software suite, metamorphose into SDN-enabled switching devices supporting the OpenFlow protocol. Within the domain of challenges and resolutions in SDN optimization for GPON networks, the ITU-T G.984.4/G.988 management standards delineate the ONT management control interface (OMCI) protocol. This specification elucidates services that can be initiated proactively through the GPON optical line terminal (OLT) through the OMCI protocol on the optical network unit (ONU), including the following:  
Figure 21: Repeater device. 1. The initiation and termination of GPON encapsulation method (GEM) connections between the OLT and ONU. 2. The configuration of VLAN settings for application services [40] and the management of a user network interface (UNI). 3. The compilation of performance statistics. However, within the context of SD-WAN-related standards, a commensurate managerial approach is notably absent. Consequently, the integration of GPON into SD-WAN management necessitates the infusion of pertinent functionalities. Given that GPON OLT platforms often employ traditional switch chips lacking support for data flow tables and lack hardware backing for OpenFlow matching fields, the implementation of Packet-In and associated data flow tables on GPON OLT platforms mandates the routing of all packets entering the OLT system to the CPU on the OLT platform for processing. This approach imposes a substantial computational load on the CPU, resulting in a significant diminution of GPON transmission efficiency. Thus, this strategic initiative deploys a groundbreaking AMI HWSN OpenFlow Proxy. This proxy seamlessly integrates traditional GPON devices into SD-WAN management without necessitating any alterations to the hardware architecture. Significantly, this framework obviates the need for additional modifications to the SD-WAN controller management module. It effortlessly virtualizes the conventional GPON network into an SD-WAN switch, readily subject to the governance of the SD-WAN controller. Consequently, the GPON network attains the advantages of heightened flexibility and emancipated management characteristic of SD-WAN networks. Moreover, it facilitates the extension of SD-WAN application services, such as network slicing, to the access network. Coupled with its compatibility with the SD-WAN OpenFlow switch architecture, this amalgamation collectively forms a virtual switch that is supportive of SD-WAN.