Katten Muchin Rosenman LLP
Communications system, and sending device, in a communication network offering both layer-2 and layer-3 virtual private network services
A communications system in which both a layer-2 and layer-3 virtual private networks (VPNS) can operate in an efficient and cost-effective way to offer improved network services. An ingress edge node has a path data manager which sets and manages path data describing configuration of an intra-network transport path. For transport over the intra-network transport path, a labeling unit adds an intra-network transport label to each outgoing frame, based on the path data. Those frames also have a VPN label for transport over an end-to-end VPN path. In an egress edge node, a frame discrimination value setting unit gives a frame discrimination value for identifying to which VPN each received frame belongs. A redirection processor redirects the received frames to their destinations according to their VPN labels and frame discrimination value.
Fujitsu Limited
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Hiroshi Yoshiaki Ryoji Kenichi
Yamada Horinouchi Nakamatsu Ishii