Backup Capacity Requirements for MPLS Fast Reroute
Backup Capacity Requirements for MPLS Fast Reroute
复制标题
MPLS 快速重路由的备份容量要求
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
M. Menth
中科院分区：
文献类型：
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作者：
R. Martin;M. Menth
MPLS快速重路由（MPLS-FRR）机制在最靠近中断位置的路由器处的网络故障的情况下使流量偏离，以实现极快的反应时间。我们审查和比较一对一的备份和设施备份的概念，MPLS-FRR的选项，通过绕道或旁路，分别偏离流量。基本上，备份路径可以采取避免从本地修复点到尾端路由器或到合并点的中断位置的最短路径。然后，我们评估的备份容量的要求和配置开销的备份路径的数量，每个主路径的参数研究取决于网络特性。虽然设施备份概念明显比一对一备份施加更少的配置开销，但其标准路径布局需要更多的容量。这可以通过简单的修改来减少。
MPLS fast reroute (MPLS-FRR) mechanisms deviate the traffic in case of network failures at the router closest to the outage location to achieve an extremely fast reaction time. We review and compare the one-to-one backup and the facility backup concept that are options for MPLS-FRR to deviate the traffic via a detour or a bypass, respectively. Basically, the backup paths can take the shortest path that avoids the outage location from the point of local repair to the tail-end router or to the merge point. We then evaluate the backup capacity requirements and the configuration overhead in terms of the number of backup paths per primary path in a parametric study depending on the network characteristics. While the facility backup concept imposes clearly less configuration overhead than the one-to-one backup, its standard path layout requires more capacity. This can be reduced by a simple modification.