MPLS VPN Fundas

MPLS VPN   MPLS stands for MultiProtocol Label Switching VPN stands for Virtual Private Network   In conventional packet forwarding every router opens the IP packet and looks at IP header to find out destination IP address and then with the help of its routing table takes independent decision to forward the packet. Handling the bulky IP header and reconstructing the ip packet again reduces the speed.   But MPLS works at layer 2. It classifies each packet based on FEC (Forwarding Equivalence Class). Subsequent routers simply look at the label and route the packet after swapping the label with a new one.