| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a failure recovery system, node, failure recovery method, and program which may reduce the probability of a forwarding loop when recovering from multiple failures in a packet switched network. <P>SOLUTION: Each node 1 in a failure recovery system, in case the second failure link is detected, determines by a similarity determination method or failure location estimation method a backup topology which may bypass the first failure link while bypassing the secondly detected failure link, on the basis of a backup topology selected to bypass the first failure link, and creates an FIB-ID lookup table 300. Upon detecting the second failure link, the node 1 refers to the FIB-ID lookup table 300 to extract a backup topology which may bypass the second failure link as well as the first failure link and forwards packets accordingly. <P>COPYRIGHT: (C)2013,JPO&INPIT |
