Yisong Liu, Toerless Eckert, Mike McBride, Zheng Zhang
{"title":"PIM Assert Message Packing","authors":"Yisong Liu, Toerless Eckert, Mike McBride, Zheng Zhang","doi":"10.17487/rfc9466","DOIUrl":null,"url":null,"abstract":"When PIM Sparse Mode (PIM-SM), including PIM Source-Specific Multicast (PIM-SSM), is used in shared LAN networks, there is often more than one upstream router. This can lead to duplicate IP multicast packets being forwarded by these PIM routers. PIM Assert messages are used to elect a single forwarder for each IP multicast traffic flow between these routers. This document defines a mechanism to send and receive information for multiple IP multicast flows in a single PackedAssert message. This optimization reduces the total number of PIM packets on the LAN and can therefore speed up the election of the single forwarder, reducing the number of duplicate IP multicast packets incurred.","PeriodicalId":21471,"journal":{"name":"RFC","volume":"48 1","pages":"1-20"},"PeriodicalIF":0.0000,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"RFC","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.17487/rfc9466","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
When PIM Sparse Mode (PIM-SM), including PIM Source-Specific Multicast (PIM-SSM), is used in shared LAN networks, there is often more than one upstream router. This can lead to duplicate IP multicast packets being forwarded by these PIM routers. PIM Assert messages are used to elect a single forwarder for each IP multicast traffic flow between these routers. This document defines a mechanism to send and receive information for multiple IP multicast flows in a single PackedAssert message. This optimization reduces the total number of PIM packets on the LAN and can therefore speed up the election of the single forwarder, reducing the number of duplicate IP multicast packets incurred.
在共享 LAN 网络中使用 PIM 稀疏模式 (PIM-SM)（包括 PIM 源特定组播 (PIM-SSM)）时，通常会有一个以上的上游路由器。这可能导致这些 PIM 路由器转发重复的 IP 多播数据包。PIM Assert 消息用于为这些路由器之间的每个 IP 多播流量选择一个转发器。本文档定义了一种在单个 PackedAssert 消息中发送和接收多个 IP 多播流信息的机制。这种优化减少了局域网上 PIM 数据包的总数，从而加快了单个转发器的选举，减少了重复 IP 多播数据包的数量。
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