What is a MPLS FEC?
An MPLS FEC consists of a set of packets that are all forwarded in the same manner by a given label-switching router (LSR). For example, all packets received on a particular interface might be assigned to a FEC. MPLS assigns each packet to a FEC only at the LSR that serves as the ingress node to the MPLS domain.
Does MPLS support multi protocol?
It is Multiprotocol as it supports multiple protocols such as Internet Protocol (IP), Asynchronous Transport Mode (ATM) and Frame Relay network protocols. The MPLS layer lies between layer 2 and 3 of the model ie the Data Link and the Network Layer. That’s why it is also known as 2.5 layer protocol or “shim” protocol.
What is MPLS full form?
Multiprotocol Label Switching (MPLS) is data forwarding technology that increases the speed and controls the flow of network traffic. With MPLS, data is directed through a path via labels instead of requiring complex lookups in a routing table at every stop.
What is the role of FECs in MPLS?
A central concept to MPLS is the Forwarding Equivalence Class (FEC), and it’s something many people new to the technology struggle to understand. So in this post I’d like to discuss FECs and their role in MPLS. An FEC is a set of packets that a single router: (3) With the same treatment (such as queuing). FECs are nothing new.
Which is the next hop for the FEC?
In this case, however, the next hop for the FEC is the termination point of the LSP at R4. The packet is encapsulated with an MPLS header – that is, an MPLS header is PUSHed onto the packet – and the packet is forwarded out the interface to R2.
How is the FEC of a packet determined?
A packet arrives at R1, and its destination IP address is examined. A lookup is performed, the packet’s FEC (again: next-hop, outgoing interface, and forwarding treatment) is determined, and using that information the packet is forwarded to the next hop router R2. R2 then repeats the process: The FEC is determined and the packet is forwarded to R3.
How are FECs used in the network World?
An FEC is a set of packets that a single router: 1 (1) Forwards to the same next hop; 2 (2) Out the same interface; and 3 (3) With the same treatment (such as queuing). More