Patent ID: 7821951

Claim:
A method that executes on a microprocessor for communicating risk information within a network including a plurality of domains connected to one another at the border nodes of said domains, comprising the steps: determining a connection path within a first domain belonging to a server network layer, said path running between a first border node of the first domain connected to a second domain and a second border node of the first domain connected to the second domain, said second domain belonging to a client network layer; determining a set of shared risk groups of the first domain which the connection path crosses; assigning a shared risk identification code to said connection path, storing, within a shared risk group management device associated with the first domain, a data structure associating said shared risk identification code with said set of shared risk groups; transmitting to the second domain both route information related to said connection path and risk information, said risk information comprising said shared risk identification code and a shared risk group management device identifier enabling the querying of said device in order to make use of said shared risk identification code; establishing a connection between two nodes of a same domain, said connection crossing said first domain along said connection path; and saving within a routing database of the second domain a link corresponding to said connection, said saved link comprising the shared risk group management device identifier and the shared risk identification code.