MPLS

Introduction:

• Generally in ip routing, packets are forward based on the ip address
• But in MPLS, ip packets are assigned with labels.
• Gnerally when forwarding ip packet, whole packet will be read. then forward
• But in MPLS, read only the top label, based on this info ip packet will be forwarded 
• Today MPLS is, for the most part, it is a standardized version of Cisco's proprietary "tag switching".
• Before using the MPLS you must enable the CEF (Cisco Express Forwarding) on the router.