| 英文摘要 |
Border gateway protocol (BGP) is an inter-domain routing protocol that allows an autonomous system (AS) to select the bestroute and decide whether this route is propagated to other ASes or not. As a network failure occurs, BGP may withdraw the failedpath and select immediately an alternative path for backup routing. In this study, we investigate an optical BGP which can giveedge-network customers in the optical networks an automatic control access to establish a light path through optical AS domains.This protocol is actually an extension of BGP in the optical network. However, in the previous research, it has indicated that BGPcannot guarantee the stability of backup routing when a system failure occurs; this instability is due to the inconstancy of localpolicies between two neighboring ASes. In order to create a stable and safe backup routing, we propose a new scheme for backuprouting in the AS domains and create guidelines for conducting local policies. We also devise an algorithm to identify the safestbackup path for inter-connected optical ASes. To verify the new scheme, the functionality of the backup routing is tested in anexperimental environment. The result shows that our new scheme can be an effective backup routing. |
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