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PIM-SM 协议的实现及引入热备份

PIM-SM 协议的实现及引入热备份. 计72 赵耀. 摘要.

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PIM-SM 协议的实现及引入热备份

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  1. PIM-SM协议的实现及引入热备份 计72赵耀

  2. 摘要 本文介绍了PIM-SM的实现以及对于热备份的一些考虑。在简单介绍了PIM-SM协议大体背景、框架后,本文重点放在描述协议的运行流程,力图通过几种典型的PIM-SM协议行为,形象地描绘出PIM-SM协议运行的整体情况,而不纠缠于网络中某一台路由器对于各种情况的细微的处理情况。同时,加入自己对PIM-SM协议的一些分析及与其他组播路由协议的对比,并对某些协议行为提出一定的改进建议。最后,本文讨论了热备份的概念及其作用,并介绍了Cisco公司的HSRP协议,在参考它的基础上,提出自己对热备份的看法,并对在PIM-SM协议中引入热备份机制提出一些观点和方案。

  3. 组播背景 组播思想组播组地址IGMP协议

  4. 组播背景

  5. PIM-SM概述 •PIM-SM的路由表• 邻居发现及DR的选举• PIM-SM加入/剪枝功能• 注册和注册抑制过程• 源发起的SPT切换• 平行路径问题的解决• 获取RP信息•PIM-SM与SNMP协议的联系

  6. PIM-SM路由表 •(S,G)• (*,G)• (*,*,RP)• WC-bit、RPT-bit、SPT-bit

  7. 邻居发现及DR选举 •发送出PIM-Hello消息•按IP大小进行DR选举

  8. Join/Prune

  9. 注册和注册停止

  10. 共享树切换到SPT树

  11. Assert过程

  12. 获取RP信息 •BSR•Hash函数计算RP

  13. PIM-SM与SNMP的关系 • PIM接口表• PIM邻居表• PIM组播路由表•PIM下一跳表•PIM RP表•PIM RP-SET表•PIM C-RP表•PIM组件表

  14. 热备份(Hot swap) • 热备份的概念• HSRP协议• 路由协议中的热备份考虑•PIM-SM中热备份应用

  15. 路由协议中的热备份考虑 • 备用路由器的状态• 对路由协议要求• 备份原则

  16. PIM-SM中热备份应用 • 备份数据• 备份方式• 备份周期• 过渡阶段协议运行方式

  17. 总结 • PIM-SM• 热备份• QoS

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