J.M. Arco, J.A. Carral, A. Garca, and G. Ibaez (Spain)
Access network, resilience, traffic balance, VPLS
Virtual Private LAN Service (VPLS) provides a multipoint to multipoint connection service but current VPLS implementations do not provide resilient access. Spanning Tree Protocol (STP) at access network is thus required to provide resilient access at the cost of unused links and significant reconfiguration delays. This article describes a new protocol, the Resilience and Traffic Balance Protocol (RBP) that provides resilience and traffic balance in VPLS network access. The protocol improves a previous one that we proposed. The RBP also works with access node failures. The proposed protocol balances the load fast and efficiently between all active access link and access nodes. The protocol is deployed on the access nodes to VPLS network with a small a software modification and also in the client Ethernet switch. The protocol has been implemented and several tests have been carried out. The results show that the effect of RBP on the system is low. The reconfiguration time is low, around 90 milliseconds.
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