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In Multiprotocol Label Switching (MPLS), a P router or provider router is a label switch router (LSR) that functions as a transit router of the core network. [1] The P router is typically connected to one or more PE routers. Here's one scenario: A customer who has facilities in LA and Atlanta wants to connect these sites over an MPLS VPN ...
A provider edge router (PE router) is a router between one network service provider's area and areas administered by other network providers. [1] A network provider is usually an Internet service provider as well (or only that). The term PE router covers equipment capable of a broad range of routing protocols, notably:
The PE router may be configured to associate all routes leading to the same CE router with the same route distinguisher, or it may be configured to associate different routes with different route distinguishers, even if they lead to the same CE router. The route distinguisher has only one purpose: to make IPv4 prefixes globally unique.
In computer networking, an edge device is a device that provides an entry point into enterprise or service provider core networks. [1] Examples include routers, [2] routing switches, integrated access devices (IADs), multiplexers, and a variety of metropolitan area network (MAN) and wide area network (WAN) access devices. Edge devices also ...
Carrier Routing System (CRS) is a modular and distributed core router developed by Cisco Systems Inc that enables service providers to deliver data, voice, and video services over a scalable IP Next-Generation Network (NGN) infrastructure. In a network topology, these routers are generally positioned in the core or edge of a service provider ...
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The customer edge router (CE) generally refers to the router at the customer premises that is interconnected with the provider edge router of a service provider's IP/MPLS network. [ 1 ] The CE router may peer with the provider edge router (PE) and exchanges routes with the corresponding VRF inside the PE for L3VPN services, or it may be ...
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