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What does MPLS stand for? MPLS stands for Multi-Protocol Label Switching.
What is MPLS? When data is propagated from one network node to the next, it is a mechanism for routing traffic within a telecommunications network. MPLS can provide applications including VPN (Virtual Private Network), Traffic Engineering (TE) and Quality of Service (QoS).
How does MPLS work? In MPLS, packets are booted over the network based on the specified tag. Tags are associated with a predetermined path through the network, which allows for a higher level of control than a packet-switched network. MPLS routing allows different QoS characteristics and priorities to be assigned to specific data streams, and operators can pre-determine the fallback path if they must reroute traffic.
Using pure IP (Internet Protocol) routing in packet-switched networks, each data packet can determine its own network path-this is a dynamic flow, but unpredictable. However, it is very cost-effective.
In the previous circuit-switched telecommunications network, the physical and T1 lines carry data and voice traffic. This provides a predictable route but is very expensive and difficult to scale due to the need to invest in a large amount of infrastructure.
Thus, MPLS and the like, Carrier Ethernet (CE) has developed to allow control of network routing, creating paths like point-to-point connections within a network, but virtual and flexible rather than physical.
MPLS has touch and sensory properties that can be set-not physical circuits, but virtual circuits. Ethernet virtual circuits, "said Errol Binda, senior marketing director at Aviat Networks.
What is the “label switching” in MPLS routing?
As packets travel through the MPLS network, their labels are switched or swapped.
The packet enters the edge of the MPLS backbone, checks, classifies, and gives the appropriate label and forwards to the next hop in the pre-set label switching path (LSP). When a packet passes through the path, each router on the path uses a label-instead of other information, such as an IP header, to make a forwarding decision to keep the packet moving along the LSP.
However, in each router, check the incoming label and match its next hop to the new label. The old label is replaced with a new label for the next destination of the packet, and then the newly tagged packet is sent to the next router. Each router repeats the process until the packet reaches the exit router.
Remove label information at the last hop or exit router so that the packet returns to be identified by the IP header instead of the MPLS tag.
What are the differences between Carrier Ethernet and MPLS?
"They all have a tagging mechanism," Binda said. "They all have the power because you are creating a title, creating a virtual tunnel, and an Ethernet virtual circuit... The main difference between the two is how many networks you have, and how much the label or path is configured."
In general, MPLS has more complex control over network dynamics and higher scalability than operator Ethernet. Compared with the traditional transmission mechanism, both have advantages in cost reduction per bit of data.
"they can, in fact, be complementary to each other," Binda added. Some operators design their networks so that the carrier ethernet is part of the network and Mpls is in another part. It is also possible to design mpls to reach the network edge.
Everyone wants to move from traditional networks to carrier Ethernet and MPLS, "Binda said." "The whole industry is thinking about how to make these technologies work together.
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