Avoiding Traffic Black-Holes for Route Aggregation in IS-IS

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Last updated 2019-03-10 (latest revision 2018-09-06)
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When the Intermediate System to Intermediate System (IS-IS) routing protocol is adopted by a highly symmetric network such as the Leaf- Spine or Fat-Tree network, the Leaf nodes (e.g., Top of Rack switches in datacenters) are recommended to be prevented from receiving other nodes' explicit routes in order to achieve scalability. However, such a setup would cause traffic black-holes or suboptimal routing if link failure happens in the network. This document introduces INFINITE cost to IS-IS LSPs to solve this problem.


Zhe Chen (chenzhe17@huawei.com)
Xiaohu Xu (xiaohu.xxh@alibaba-inc.com)
Dean Cheng (dean.cheng@huawei.com)

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)