| 摘要 |
In an autonomous network, one and the same routing protocol is employed in the network. An additional network which is an autonomous system dedicated to backup routes is added to an existing network which is an existing autonomous system, to thereby provide redundancy to the autonomous network. Part of traffic on the existing network is transmitted by use of the additional network. Therefore, at occurrence of failure, communication can be restored in a short period of time in the autonomous network.
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