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A provider edge router is a router between one network service provider's area and areas administered by other network providers. A network provider is usually an Internet service provider as well.
The term PE router covers equipment capable of a broad range of routing protocols, notably:
PE routers do not need to be aware of what kind of traffic is coming from the provider's network, as opposed to a P router that functions as a transit within the service provider's network. However, some PE routers also do labelling.
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