A provider edge router (PE router) is a
router between one
network
Network, networking and networked may refer to:
Science and technology
* Network theory, the study of graphs as a representation of relations between discrete objects
* Network science, an academic field that studies complex networks
Mathematics ...
service provider's area and areas administered by other network providers.
A network provider is usually an
Internet service provider
An Internet service provider (ISP) is an organization that provides services for accessing, using, or participating in the Internet. ISPs can be organized in various forms, such as commercial, community-owned, non-profit, or otherwise privatel ...
as well (or only that).
The term ''PE router'' covers equipment capable of a broad range of
routing
Routing is the process of selecting a path for traffic in a network or between or across multiple networks. Broadly, routing is performed in many types of networks, including circuit-switched networks, such as the public switched telephone netw ...
protocols, notably:
*
Border Gateway Protocol
Border Gateway Protocol (BGP) is a standardized exterior gateway protocol designed to exchange routing and reachability information among autonomous systems (AS) on the Internet. BGP is classified as a path-vector routing protocol, and it mak ...
(BGP) (PE to PE or PE to CE communication)
*
Open Shortest Path First
Open Shortest Path First (OSPF) is a routing protocol for Internet Protocol (IP) networks. It uses a link state routing (LSR) algorithm and falls into the group of interior gateway protocols (IGPs), operating within a single autonomous syste ...
(OSPF) (PE to
CE router communication)
*
Multiprotocol Label Switching
Multiprotocol Label Switching (MPLS) is a routing technique in telecommunications networks that directs data from one node to the next based on labels rather than network addresses. Whereas network addresses identify endpoints the labels identi ...
(MPLS) (PE to
P router communication)
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.
See also
*
Customer edge router
*
Provider router
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. The P router is typically connected to one or more PE routers.
Here's one scenario: A ...
References
{{DEFAULTSORT:Pe Router
Routers (computing)
MPLS networking