Summary

This Recommendation describes the set of functions required to establish, operate and maintain client/server and peer level Virtual Private Networks (VPNs). The network functionality is described from a network level viewpoint, taking into account the VPN network layered structure, client characteristic information, client/server associations, networking topology and layer network functionality.

The functional models are described using the modelling methodology described in ITU‑T Recs G.805 and G.809. The modelling methodology employed is network technology‑independent and therefore the functional models and associated functions described apply to all VPN layer network technologies.