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Dell EMC SmartFabric OS10 User Guide Release 10.5.0

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复合鉴别器

如果两个自治系统连接到多个位置,请使用复合鉴别器 (MED) 将首选项分配给首选路径。MED 是用于确定最佳路径的条件之一 — 其他条件可能也会影响选择。

复合鉴别器

将 AS 分配给 MED 值。其他 AS 使用该值来确定首选路径。假设 MED 是唯一应用的属性,并且在 100 和 200 之间有两个连接。每个连接都是一个 BGP 会话。AS 200 将链路 1 退出点的 MED 设置为 100,并将链路 2 退出点的 MED 设置为 50。这会通过链路 2 设置路径首选项。MED 通告为 AS 100 路由器,因此它们知道是首选路径。

MED 是不可传递的属性。如果 AS 100 将 MED 发送到 AS 200,则 AS 200 不会将其作为 AS 300 或作为 AS 400 传递。MED 是两个参与的 AS(AS 100 和 AS 200)的本地相关的属性。MED 在两个链路之间通告 — 如果链路停止,则 AS 100 可连接到 AS 300 和 AS 400。


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