MPLS

MPLS is an acronym for Multi-Protocol Label Switching. It is a mechanism that is used in the high performance telecommunication network all around the world to direct and carry the data from one network node or end point to the next through the entire network with the help of the labels that are attached to the data by the protocol itself. MPLS is basically an IETF initiative that integrates layer 2 information about network links, that is utilization, bandwidth and latency in to the layer 3 within a particular AS or autonomous system to improve the IP packet exchange.

The main aim of using this MPLS is to increase the speed of the data that is being transferred in the network as higher speed at which the data can be sent is the growing demand of the market. The following material states that how the MPLS works.

In the MPLS the data is prefixed with a header that is made up of several things, they are, a 20 bit value label, a 3 bit traffic class field, a 1 bit bottom of stack flag and a 8 bit Time to live or TTL. This label is given to the data by the LERs or Label Edge routers. The labels assigned to the data also include the source IP address and the destination address in addition to the things mentioned above. Once the process of assigning the packets with the label is finished then different packets are assigned to the corresponding LSPs where the LSRs place the outgoing labels on the packets.

Once the packets leave the source then throughout the network the routers would just scan the destination address and the class type and depending upon this information will route the packet to its destination, thus reducing the time that a router needs to spend per packet to decide its destination. Once the packets reach the destination the labels are removed and the data used or extracted.