What is a Transparent LAN Service?
A network element that carries a Transparent LAN Service has the capability to perform Layer 2 measurements. Those measurements are performed using counters located on the hardware level, and they are collected by a central Network Management System. Those counters allow for the collection of the Quality of Service (QoS) metrics, which are used to determine the overall performance of the network. A label, which identifies the service, is placed in the frame for easy identification.
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For business users, a Transparent LAN Service provides a point-to-point connection between two or more locations. Transparent LAN services support enterprise LAN-to-LAN connections, wireless backhaul, and Ethernet exchanges. The service can be ordered with 18 different bandwidth levels and includes a new single-mode or multimode fiber interface. There are also new features for the service, such as multipoint connection sharing and combining multiple virtual connections. And it also includes a SONET network transport option, so customers can specify what their data will be sent over.
Transparent LAN Service can be carried over a backbone network, leased circuit, or shared circuit. The former is the most expensive option, as it requires a separate physical circuit for each LAN, which makes it expensive. Shared circuits have the advantage of using the same bandwidth for multiple services. Despite its lower cost, however, you can’t guarantee QoS with shared circuits. You can check the Quality of Service by monitoring the performance of the backbone.
The Transparent LAN Service is an Ethernet layer 2 switching service, similar to bridging smaller networks. It lets branch offices work together. Virtual private LAN service is another emerging solution. Unlike the former, it uses IP networks and MPLS for the core network. A network service provider with a nationwide IP network can offer you the same capabilities as a traditional LAN. So, if your business has multiple locations, it’s easy to connect them through Transparent LAN service.
After you’ve received your Inquiry Confirmation Notice, you can begin working on your Transparent LAN Service strategy. The Transparent LAN Service All-Inclusive Self-Assessment includes the necessary tools for an in-depth assessment. This comprehensive report identifies areas for improvement and helps you plan for the future. You can even create a scorecard that shows you exactly which Transparent LAN Service areas need attention.
Generally, Transparent LAN Service uses GFP encapsulation to enable transparency for all upper layer protocols, such as Internet Protocol (IP), IPX, and Multi-Protocol Label Switch (MPLS). The Transparent LAN Service can be carried over a single shared circuit. The traffic stream from the LAN segment to the backbone network is mapped over SDH. A virtual container is used to carry the Transparent LAN Service.
The TTO value of network element B is measured every hour and day. The arithmetic mean of these values provides an estimate of the Quality of Service for that day. The TTO value must be within the CIR and PIR boundaries. Generally, this value will be greater than the thresholds and lower than PIR. The TTO value must also fall within the range between the two levels, CIR and PIR.
An Ethernet virtual circuit is a point-to-point solution for the same purpose. It is managed by the carrier, which allows it to control the sites in and out of the network and provide better Quality of Service. This approach is preferred by many customers because it allows the carrier to control the network and limit the number of virtual circuits per site. Moreover, the customer does not have control over VLAN IDs, which is one of the major drawbacks of EVCs.
