The service received by the customer as a result of the service provided is at the heart of the service level agreement. In addition, there are three other classifications: customer-based SLAs, services and several steps. Physical network features: this is the type of network infrastructure service that the service provider is willing to provide. This data is expressed in terms of network availability (system availability) and network capacity (throughput). While most companies want 100% availability, this may not be necessary in many environments. For example, in e-commerce environments, 100% availability is essential. However, for traditional trading environments, an average of between 99.5% and 99.9% may be acceptable. By indicating throughput, the capacity of a network in the capacity of basic connections within the core of the network, z.B 10 Gbps, is detailed. In addition to these ComTech tools, the following pages provide guidance on the performance of Internet gateways, ComTech does not provide service level guarantees for Internet access. To measure compliance with the service levels defined in this document, we rely on several instruments: alS should contain not only a description of the services to be provided and their expected level of service, but also metrics to measure the services, obligations and responsibilities of each party, corrective measures or penalties in the event of an infringement, as well as a protocol for adding and removing metrics. Are you actively monitoring your WAN service level agreement? The PAHO methods used in the INTERCONNEXION networks of these transport networks are consistent with the link network protection mechanisms established to date . These methods include 1:1 (one-to-one) wavelength protection and 1-1 (one plus one) switching of the wavelength.
With a 1:1 wavelength switch, a special protection channel is available for each functional WDM channel on a diverse path in the standby area. (Note that to be truly 1:1, the same wavelength must be reserved on both paths, although only one path is illuminated at any given time). An interesting capex architecture lower than this protective mechanism, which is best suited to networks limited by connection errors, uses a single transponder, whose line side is connected to a directionless ROADM. Therefore, if an error is detected on the main path, the system triggers the ROADM without direction to automatically move to the protection path. This scheme also allows 1:N protection, in which several work lanes can be protected by a single protective path. In the 1-1 wavelength protection circuit, each work channel has a dedicated protection channel and the same payload is emitted simultaneously by both channels. In the event of a failure, the receiver switches from the protective lane to the signal. This protection scheme is often used and referred to as Y cable protection.
At 1-1, there are two active wavelength channels, not necessarily on the same wavelength, between the ends. Note that 1-1 offers faster recovery than 1:1, as the two arrival points of the ROADM continuously receive data and switches by changing the transponders that power the Y cable. However, 1-1 protection requires twice as many transponders. Finally, note that the two mechanisms can be combined with the restoration, which gives 1:1-R and 1-R respectively, which would add an extra layer of redundancy in the event of an error. Restoration would attempt to dynamically restore a new path to dynamically restore a failed connection, to restore redundancy to 1-1 or 1:1, while the protection channel has become a functional channel. Given the considerable state of technology in these protection systems, including the latest advanced work on 1:1-R and 1-R advanced as part of WSON (Wavelength switched Optical Network) , the introduction of OPS in DCI transport systems has been quite simple. In most DCI networks, and especially on IRD networks, optical restoration was possible in a few dozen ms thanks to most of the system`s implementations.