What is a label-edged router (LER)?
A label-edged router (LER) is a PE router. A PE router is a provider edge router, which is a router that connects an MPLS network to a customer network. A LER is a term used in MPLS to describe a router that resides at the ingress and egress points of an MPLS network, handling both labelled and unlabelled packets.A LER performs label operations such as adding, removing, or swapping labels on packets entering or leaving the MPLS network34.
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