The customer edge is the router at the customer premises that is connected to the provider edge of a service provider IP

Internet Protocol

The Internet Protocol is the principal communications protocol used for relaying datagrams across an internetwork using the Internet Protocol Suite...

/MPLS network. CE peers with the PE and exchanges routes with the corresponding VRF

VRF

In IP-based computer networks, Virtual Routing and Forwarding is a technology that allows multiple instances of a routing table to co-exist within the same router at the same time...

 inside the PE. The routing protocol used could be static or dynamic (an Interior Gateway Protocol

Interior gateway protocol

An interior gateway protocol is a routing protocol that is used to exchange routing information within an autonomous system ....

 like OSPF or an Exterior Gateway Protocol like BGP).