MPLS domain

MPLS domain

(networking)
A portion of a network that contains devices that understand MPLS.
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This VPN will be capable of Multiprotocol Label Switched (MPLS) service that allows Joint Router-Customer Edge (JR-CE) and Joint Base-Customer Edge (JB-CE) routers to function on a single MPLS domain. As a result, sensitive JRSS traffic flows will be more easily monitored by parties using the Defense Information Systems Network (DISN).
After entering into MPLS domain, the first MPLS enabled router, known as Label Edge Router (LER) or Ingress LER is assigned the task of labeling the packet.
The central idea of MPLS is to attach a short fixed length label to packets at the ingress router which is basically the starting edge router of the MPLS domain.
A router placed on the edge of the MPLS domain, named Label Edge Router (LER) that is associated to a label on the basis of Forwarding Equivalence Class (FEC).