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The work reported here is concerned with the process of arranging network topological information into clusters according to the relevant area of failure restoration. The clusterisation outcome is determined by employing "level structure" arrangement with reference to each possible failure scenario. This set of information, as interpreted from restoration area needed for each failure event, is required to be stored at each node in case of restoration. The results have shown that the restoration of each failure case is achieved with sufficiently minimum amount of required information. Additionally, the amount of information can be adjusted to suit other criterion such as extra restoration area in case of insufficient spare capacity.