It is the one of the route protocols that the backbone routers must support.

它是骨干路由器必须支持的协议。

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This paper mainly discusses the backbone design of Guiyang educational metropolitan area network, including network topology, fiber network, route design, network devices and network expansion, etc.

本文主要讨论贵阳市教育城域网的主干网络设计，主要涉及网络的拓朴结构、光纤网络设计、路由设计、设备参考选型和将来网络扩展等方面的问题。

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New route data has considered the tolerance mostly, combined with original backbone network, so we can control the accident impact.

方案最大限度的考虑容灾性，结合原有骨干网的分层结构，将故障影响降到最低。

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