Method and system for configuring virtual private network multi-domain.

Method for configuring a virtual private network VPN-(22A-C) multi-domain in a network (1) communications network having (1) at least two communication domains (10A-E) interconnected, and in which customers are connected to the VPNs (22A-C) in nodes (14; 14 ') border at least two domains (10A-E), comprising the steps of: initiating a connection request to connect a first node (14 ') border in a first domain (10E) to a first VPN (22A) not currently available in the first domain (10E); providing (24, 62) domain VPN information within at least two domains; domain VPN information comprising at least VPN identity of VPNs available in the respective domain; establish a correspondence between an identity of the first VPN (22A) and identities of a second domain VPN of at least two different domains the first domain (10E); and configuring the first VPN (22A) to comprise the first node (14 ') border, based on the result of the step of establishing correspondence.