
Fundamentals of MPLS VPNs 15
Fundamentals of MPLS VPNs
To understand MPLS VPN technology, it is important to know its basic concepts. This
section explains the nomenclature used in MPLS VPN networks and how MPLS works
in simple terms. One important differentiator of MPLS networks is that they employ a
connectionless VPN technology. The concepts of MPLS and VPN technology are explained
here.
Nomenclature of MPLS VPNs
RFC 2547bis, “BGP/MPLS IP VPNs,” describes the nomenclature and definitions used in
the MPLS VPN framework. More precisely, it defines IP VPNs, meaning that the VPN
service accepts IP datagrams from customer sites and delivers them also ...