Transport control server, transport control system, and backup path setting method

摘要

A transport control server (TCS) identifies a backup path B switched over to from an active path A due to a path change or a fault, based on information in a path change notification or a fault notification. The TCS identifies a backup path C affected by the switchover from the active path to the backup path. The TCS identifies nodes in which a setting change to delete the backup path C is needed and nodes in which a backup path D should be set up as an alternative to the backup path C and transmits a setting change notification to these nodes.

主权项

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.