This topology is also known as Hub and Spoke or partial mesh network topologies, but regardless, this type of WAN topology creates a service that addresses the need to have a hub site with several sites connected.įull mesh topology allows all the connected devices in the WAN topology to communicate with each other, and the people who develop MetroE has anticipated that there is a need for full-mesh connectivity of devices wherein they all send and receive Ethernet frames to each other directly without having to be dependent on a central hub. This Metro Ethernet service is known as E-Tree, wherein the central site is the E-Tree Root and the remote sites are the E-Tree leaves.
This WAN topology requires a central site device that directly sends Layer 2 frames to reach remote sites, but the remote sites can only send frames to the central site. But with MetroE, service providers offer what is called an Ethernet Line Service or E-Line where two customer premise equipment (CPE) devices can exchange Ethernet frames, similar in concept to a leased line. Typical dedicated leased lines connections are offered with this kind of setup, such as an E1 or T1 line. Point-to-point topology is transparent to the customer network and acts as if there are physical connections between remote sites. The customer basically requires basic point-to-point network connectivity between two sites separated geographically that will allow them to send and receive Ethernet frames to each other as if they are connected directly. To be able to connect multiple sites across Wide Area Network, the service provider should be well aware of the topology to be used to address the enterprise client’s needs. We will be discussing the popular WAN technology nowadays, such as Metro Ethernet (MetroE), wherein it uses physical Ethernet links to connect the customer’s network devices to the service provider’s network and other WAN topology that are used today. We are going to tackle the different network topologies that address the various situation needed by customers which the service provider provides their WAN services to interconnect their clients’ sites for a certain amount based on the requirement such as bandwidth, availability, and speed.
Wide Area Network (WAN) tackles the different geographical locations, such as branches on any other site or remote location, challenges that a LAN usually encounters.
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