E-SPRING SUPPORT OF ETHERNET PROTECTION

摘要

A method of routing traffic through a packet network having a mesh physical topology. At least two types of network primitive are defined, each type of network primitive providing a respective model of traffic forwarding through at least two neighbour nodes of the network. A network model encompassing at least a portion of the network is constructed using a set of two or more interconnected network primitives. The network model has nodes and links corresponding to respective nodes and lines of the network. Respective forwarding information is computed for each node of the network model. For each node of the network model, the respective computed forwarding information is installed in a forwarding database of the corresponding node of the network, such that traffic is forwarded by each node of the network in accordance with the respective computed forwarding information.

主权项

1. In a packet network having a mesh physical topology, a method of controlling traffic forwarding between a source node and a destination node of the packet network, the method comprising:
controlling at least one physical node of the packet network to forward an end-to-end traffic flow between the source node and the destination node using a chain of interconnected network primitives extending between the source node and the destination node, the chain of interconnected network primitives including:
at least one ring network primitive comprising a model of bi-directional traffic forwarding through at least two neighbour nodes interconnected in a ring topology; andat least one sub-ring network primitive comprising a model of bi-directional traffic forwarding through at least two neighbour nodes interconnected in a linear topology between first and second end-nodes, and between the first and second end-nodes via a virtual link mapped through at least one other network primitive.