ITU-T network model extension for virtualized network architectures

Abstract

The new Network Virtualization paradigm permits the automated deployment of Virtual Network Functions over an abstracted Virtualization Infrastructure. The stacking of each layer requires some complex networking that may lead to misconfiguration. We think that the ITU-T layer network models used for legacy transport networks are appropriate to depict the corresponding architecture. We propose to extend them with an additional IP layer model. We illustrate how the ITU-T layer network models have helped to troubleshoot the deployment of an OpenStack infrastructure.