What is pseudowire?

Pseudowire is a term provided by telecommunications and computer network technology where the circuit is emulated through an existing network. Basically, it creates a new virtual wire through an existing packet switched network (PSN). In this way, older technology can be used to create a specialized wire for a customer, which then does not realize any difference between older circuit and emulated. Later, the Internet Engineering Working Group (IETF) created a working group around the concept to find out how to standardize the service provider and describe the relevant techniques in detail. They became known as the Pseudowire Emulation Edge to Edge (PWE3) and papers presented to the Martini Working Group and his team became known about As Martini Drafts, with a few subsequently nicknamed dry Martini papers.

The reason for the edge of the edge to the edge is how the technique of implement istuned. From the perspective of the service provider, the pseudowire starts on the edge of the provider's network, when the customer's obligation ends only to the opposite edge of the provider, where the customer's liability is re -picking up. In this way, the service provider can create a new, reserved circuit for the customer in an existing network of switched packets. This is possible for many of the most commonly used OSI data connection layers, two layers, protocols such as Ethernet, asynchronous transmission mode (ATM), relay with frame or other multiplexing method (TDM). PSN of the underlying service provider can be the network version of the Four or version of the Six Internet Protocol (IP), MPLS network or implemented using I iverze ETF three from the tunneling protocol (L2TPV3).

Since network traffic leaves the customer's net and encounters Edged provider, it is packed for delivery via an emulated circuit. Several layers are added to the packet, the first of which contains addresses for each of the features of the provider. OnOjening is also a layer of encapsulation that contains information that needs to go through packets of pseudowire, if the provider has many emulated on the PSN, and information about the type of useful load, such as the original protocol used in the customer network that is launched for virtual wire transmission. The last layer is the actual payload of data. When the encapsulated packet reaches the second edge of the Provider's tunnel, it is interrupted for delivery to the customer's network and returns the original protocol information.

Pseudowires ultimately provides the ability for older technology to converge more dreamy methods, as the technique allows many older network protocols to continue to be used. It is also much more cost -effective to create emulation over existing PSNs, unlike creating other parallel wires. Some companies have implemented their own pseudowire form, one of which was TDMOIP® technology created by Rad Data Communications®. Cisco systemEMS® also offers technology in its router devices, called any transport over MPLS (Atom®).