ENARSI TRAINING

MPLS is a new forwarding mechanism called "label switching" in which packets are forwarded based on labels. However, hosts are unaware about labeled packets so routers will need to add a label when entering "MPLS area" and remove that label after leaving there... The idea of label switching is to have only the first router do an IP lookup and assign a label, then all future routes in the network can "cheat" by doing exact match "switching" based on a label. This would reduce load on the core routers, where high-performance was the most difficult to achieve, and distribute the routing lookups across lower speed edge routers... * Each router performs an IP lookup ("routing"), determines a next-hop based on its routing table, and forwards the packet to that next-hop.

Also known as: networktut