wimaxing 2008-6-30 11:31
RFC5059-Bootstrap Router (BSR) Mechanism
【资料成文时间】： 2007
【语言】：英文
【页数】：42
【何人（公司）所著】：
【文件格式】： PDF
【文件原名】：Bootstrap Router (BSR) Mechanism for Protocol Independent Multicast (PIM)
【摘要或目录】：
Table of Contents
1. Introduction ....................................................3
1.1. Background .................................................3
1.2. Protocol Overview ..........................................5
1.3. Administrative Scoping and BSR .............................6
2. BSR State and Timers ............................................8
3. Bootstrap Router Election and RP-Set Distribution ...............9
3.1. Bootstrap Router Election ..................................9
3.1.1. Per-Scope-Zone Candidate-BSR State Machine .........10
3.1.2. Per-Scope-Zone State Machine for
Non-Candidate-BSR Routers ..........................11
3.1.3. Bootstrap Message Processing Checks ................13
3.1.4. State Machine Transition Events ....................14
3.1.5. State Machine Actions ..............................15
3.2. Sending Candidate-RP-Advertisement Messages ...............17
3.3. Creating the RP-Set at the BSR ............................18
3.4. Forwarding Bootstrap Messages .............................21
3.5. Bootstrap Messages to New and Rebooting Routers ...........22
3.5.1. No-Forward Bootstrap Messages ......................23
3.5.2. Unicasting Bootstrap Messages ......................23
3.6. Receiving and Using the RP-Set ............................23
4. Message Formats ................................................24
4.1. Bootstrap Message Format ..................................26
4.1.1. Semantic Fragmentation of BSMs .....................30
4.2. Candidate-RP-Advertisement Message Format .................31
5. Timers and Timer Values ........................................33
6. Security Considerations ........................................36
6.1. Possible Threats ..........................................36
6.2. Limiting Third-Party DoS Attacks ..........................36
6.3. Bootstrap Message Security ................................37
6.3.1. Unicast Bootstrap Messages .........................37
6.3.2. Multi-Access Subnets ...............................38
6.4. Candidate-RP-Advertisement Message Security ...............38
6.4.1. Non-Cryptographic Security of C-RP-Adv Messages ....38
6.4.2. Cryptographic Security of C-RP-Adv Messages ........39
6.5. Denial of Service using IPsec .............................39
7. Contributors ...................................................40
8. Acknowledgments ................................................40
9. Normative References ...........................................40
10. Informative References ........................................41