TRANSPORT CONTROL SERVER, TRANSPORT CONTROL SYSTEM, AND BACKUP PATH SETTING METHOD

摘要

Transport control server (TCS) in a network system including a first backup path (FBP) with predetermined first bandwidth (PFB) secured or reserved between any node pair, second backup path (SBP) with predetermined second bandwidth (PSB) secured or reserved between any node pair, the FBP and SBP sharing a link, each node forwards data according to path setting information. The TCS including: a storage section storing, for each path, an identifier for each node through which the path passes; and a control processing section performing: upon switchover of first active path to FBP, judging whether PSB of SBP can be secured or reserved by the bandwidth of the shared link through which the FBP passes, by referring to the storage section; if not, identifying nodes through which the SBP passes, by referring to the storage section; and transmitting a setting change notification to delete the SBP to the identified 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 the nodes, the first backup path and the second backup path sharing at least one link, and each of the nodes forwards data according to 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 nodes through which the path passes, the predetermined first bandwidth and 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, by referring to the storage section; and transmitting a setting change notification to delete the second backup path to the identified nodes.