发明名称 |
Ring network system, failure recovery method, failure detection method, node and program for node |
摘要 |
In a multi-ring network with a plurality of rings to which RPR is applied connected, high-speed failure recovery is enabled when a failure occurs between the rings. The contact nodes 700-1 and 700-3 connected to the living inter-link 505 periodically transmit and receive a KeepAlive signal to/from each other. Then, when a KeepAlive signal fails to arrive for a fixed time period, determination is made that the inter-link 505 develops a fault to broadcast-transmit an inter-link failure notification RPR-MAC frame indicative of failure occurrence on the inter-link to each node. A contact node as a transmission source of the inter-link failure notification RPR-MAC frame and each node having received the inter-link failure notification RPR-MAC frame immediately flush learning contents of their own learning data bases. A contact node connected to the spare inter-link 506 switches the spare inter-link 506 to a forwarding state.
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申请公布号 |
US7898942(B2) |
申请公布日期 |
2011.03.01 |
申请号 |
US20060887289 |
申请日期 |
2006.03.31 |
申请人 |
NEC CORPORATION |
发明人 |
TAKAGI KAZUO;SAKAUCHI MASAHIRO;OGASAHARA DAISAKU |
分类号 |
H04L12/42;H04L12/437;H04L12/56 |
主分类号 |
H04L12/42 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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