Patent ID: 8811149
Filing Date: 2014-08-19
Classification: H04L

Abstract:
1. A transport control server in a network system including a plurality of nodes and the transport control server, wherein a first backup path having a predetermined first bandwidth is predefined for a first active path having the predetermined first bandwidth secured or reserved between any pair of the nodes, a second backup path having a predetermined second bandwidth secured or reserved is predefined for a second active path having the predetermined second bandwidth secured or reserved between any pair of nodes, the first backup path and the second backup path setting information notified from the transport control server, the transport control server comprising: a storage section storing, for each of the paths, an identifier for each of the predetermined second bandwidth; and a control processing section, wherein the control processing section performs the following which includes: upon a switchover of the first active path to the first backup path, judging whether the predetermined second bandwidth of the second backup path can be secured or reserved by the bandwidth of the shared link through which the first backup path passes, by referring to the storage section; if the predetermined second bandwidth cannot be secured, or reserved, identifying nodes through which the second backup path passes, referring to the storage section; and transmitting a setting change notification to delete the second backup path to the identified nodes.