wimaxing 2008-6-30 11:30
RFC5058-Explicit Multicast (Xcast) Concepts and Options
【资料成文时间】： 2007
【语言】：英文
【页数】：35
【何人（公司）所著】：
【文件格式】： PDF
【文件原名】：Explicit Multicast (Xcast) Concepts and Options
【摘要或目录】：
Table of Contents
1. Introduction ....................................................3
2. Xcast Overview ..................................................4
3. The Cost of the Traditional IP Multicast Schemes ................6
4. Motivation ......................................................9
5. Application ....................................................11
6. Xcast Flexibility ..............................................12
7. Xcast Control Plane Options ....................................13
7.1. SIP Control Plane for Xcast ...............................14
7.2. Receiver-Initiated Join for Xcast .........................14
8. Optional Information ...........................................15
8.1. List of Ports .............................................15
8.2. List of DSCPs .............................................15
8.3. Channel Identifier ........................................15
9. Possible Xcast Packet Encoding .................................16
9.1. General ...................................................16
9.2. IPv4 ......................................................17
9.2.1. IPv4 Header ........................................17
9.2.2. Xcast4 Header ......................................17
9.3. IPv6 ......................................................20
9.3.1. IPv6 Header ........................................20
9.3.2. Xcast6 Header ......................................20
9.3.2.1. Routing Extension Header ..................21
9.3.2.2. Destination Extension Header ..............21
10. Impact on Upper-Layer Protocols ...............................22
10.1. Checksum Calculation in Transport-Layer Headers ..........22
10.2. IPsec ....................................................22
11. Gradual Deployment ............................................23
11.1. Tunneling ................................................23
11.2. Premature X2U ............................................25
11.3. Semi-Permeable Tunneling (IPv6 Only) .....................25
11.4. Special Case: Deployment without Network Support .........26
11.5. Using a Small Number of Xcast-Aware Routers to
Provide Xcast ............................................27
12. (Socket) API ..................................................28
13. Unresolved Issues .............................................28
13.1. The Format of the "List of Addresses" ....................28
13.2. The size of Channel Identifier ...........................28
13.3. Incremental Deployment ...................................28
13.4. DSCP usage ...............................................29
13.5. Traversing a Firewall or NAT Products ....................29
13.6. The Size of BITMAP .......................................29
14. Security Considerations .......................................29
15. IANA Considerations ...........................................30
16. Informative References ........................................31
17. Contributors ..................................................33