Provider edge router
Type of router
A provider edge router (PE 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 (or only that).
The term PE router covers equipment capable of a broad range of routing protocols, notably:
- Border Gateway Protocol (BGP) (PE to PE or PE to CE communication)
- Open Shortest Path First (OSPF) (PE to CE router communication)
- Multiprotocol Label Switching (MPLS) (CE to PE (ingress eLSR) or PE to CE (egress eLSR), also PE to P (and visa versa))
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.
Sources and credits
This article is adapted from the Wikipedia article “Provider edge router”, written by its contributors and licensed under CC BY-SA 4.0. Fathomly has changed the layout, removed citation markers, navigation and maintenance notices, and adjusted punctuation. This adapted version is shared under the same license. For references, see the original article.
Images, from Wikimedia Commons:
- MPLS-cloud.svg by Tule-hog, CC0
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