各厂家标签分配组合（默认）

guotch

于 2020-08-06 10:03:28 发布

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分类专栏：网络技术

本文链接：https://blog.youkuaiyun.com/guotch/article/details/107832590

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本文深入探讨了华为设备上DU+ordered+Liberal模式和思科设备上的下游按需（Downstream-on-Demand）模式在MPLS LDP中的应用。重点讲解了下游按需模式下，标签仅在对等体明确请求时才进行广告，同时解释了在未分配远程标签的情况下如何发送标签请求。

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华为： DU+ordered+Liberal

思科：

This Downstream on demand feature adds support for downstream-on-demand mode, where the label is not advertised to a peer, unless the peer explicitly requests it. At the same time, since the peer does not automatically advertise labels, the label request is sent whenever the next-hop points out to a peer that no remote label has been assigned.

To enable downstream-on-demand mode, this configuration must be applied at mpls ldp configuration mode:

mpls ldp downstream-on-demand with ACL