Cisco mpls fundamentals 32 bit#

LSP (Label Switched Path):Р’В It is the path along which the traffic flows across an MPLS network. It is also called a transit router.Р”Р„n LSR can be an ingress LSR or an egress LSR.Р’В Ingress and Egress LSRs are known as LERs (Label Edge Routers)Р’В as they are responsible for imposition and removal of MPLS labels. LSR (Label Switched Router):Р’В This is the router that does traffic forwarding based on MPLS labels. It is important to note that these routers only forward traffic based on MPLS labels.

P (Provider) Routers:Р’В These are located in the provider core and act as MPLS backbone routers. TheР’В PE routers do MPLS label switching as well as IP lookups. PEР’В (Provider Edge):Р’В The device at the Provider side where customers are terminated. This can be a router or any CPE that is used to communicate with the Provider network. РІР‚вЂ№MPLS VPN: The creation of VPNs using MPLS backbone that allows for connecting different customer sites located in different regions across the globe over a service providerРІР‚в„ўs network.Р”В¬EР’В (Customer Edge):Р’В The device placed at the customer end. Each reserved label has its own specific function such as Label 3 is the implicit NULL label whereas Label 14 is OAM alert label, and so on and so forth. They cannot be used by an LSR for normal forwarding. Label numbers ranging from 0 to 15 are reserved labels and can only be used for special purposes.

Cisco mpls fundamentals 32 bit#

Label:Р’В It is a 32 bit field that is locally significant and is used to represent an FEC of a packet. This behaviour is known as AToM i.e Any Transport over MPLS. Highlight: MPLS is called Multiprotocol because it can carry anything over an MPLS path irrespective of the underlying protocol:Р’В Ethernet, ATM, PPP, SONET etc. MPLS is also called Layer 2.5 as it resides between Layer 2 and Layer 3 of the OSI layer model. MPLS directs data from one network node to the next based on short path labels rather than long network addresses, avoiding complex look-ups in a routing table. MPLS is the most widely used technology in Internet Service Providers and Telecom Networks all over the world. MPLS is an acronym for Multiprotocol Label Switching whichР’В is a type of data-carrying technique for high-performance telecommunications networks.