DAY ONE: CONFIGURING SEGMENT ROUTING WITH JUNOS /用JUNOS配置Segment Routing

DAY ONE: CONFIGURING SEGMENT ROUTING WITH JUNOS /用JUNOS配置Segment Routing插图
DAY ONE: CONFIGURING SEGMENT ROUTING WITH JUNOS /用JUNOS配置Segment Routing插图1

Let’s begin with a short history of Segment Routing (SR). One of the key properties of SR is that MPLS labels are distributed via the Interior Gateway Protocol (IGP),ISIS or OSPF, rather than a dedicated label distribution protocol. Another is the concept of Source Routing – encoding the path to be taken by a packet by means of a stack of headers applied to the packet when launching it into the network. A draft from Juniper containing these elements got the ball rolling in the IETF in February 2013, and drafts from other vendors soon followed. Later in 2013, an IETF working group dedicated to SR was formed, called “SPRING” (Source Packet Routing in Networking). The terms “Segment Routing” and “SPRING” are synonymous, and are used interchangeably throughout this book. Over the last five years, a myriad of drafts have been published in the IETF covering architecture,use cases, and extensions to protocols, including ISIS, OSPF, BGP, and PCEP.

SR的关键特性之一是MPLS标签是通过内部网关协议(IGP),ISIS或OSPF而不是专用标签分发协议来分发的。 另一个是源路由的概念-在将数据包启动到网络中时,通过应用到数据包的标头堆栈对数据包采用的路径进行编码。 Juniper提出的包含这些要素的草案于2013年2月在IETF中引起关注,其他供应商的草案也紧随其后。 2013年下半年,成立了一个专门负责SR的IETF工作组,称为“ SPRING”(网络中的源数据包路由)。 术语“段路由”和“ SPRING”是同义词,在本书中可以互换使用。 在过去的五年中,IETF已发布了许多草案,涉及体系结构,用例和协议扩展,包括ISIS,OSPF,BGP和PCEP。

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DAY ONE: CONFIGURING SEGMENT ROUTING WITH JUNOS /用JUNOS配置Segment Routing
Juniper网络技术论坛