Содержание
- 2. Alberto Ornaghi 2002 Abstract This document specifies Version 3 of the Internet Group Management Protocol, IGMPv3.
- 3. Alberto Ornaghi 2002 Table of contents Introduction . . . . . . . . .
- 4. Alberto Ornaghi 2002 Introduction The Internet Group Management Protocol (IGMP) is used by IPv4 systems (hosts
- 5. Alberto Ornaghi 2002 IGMP through versions Version 1, specified in [RFC-1112], was the first widely-deployed version
- 6. Alberto Ornaghi 2002 IGMP v1 - Behaviour Group member router LAN 3 Group member Group member
- 7. Alberto Ornaghi 2002 IGMP v1 - Pruning router router router router router router Group Member Group
- 8. Alberto Ornaghi 2002 IGMP v2 - enhancements IGMP v2 introduces a procedure for the election of
- 9. Alberto Ornaghi 2002 IGMP v2 - Pruning router router router router router router Group Member Group
- 10. Alberto Ornaghi 2002 IGMP v3 - features MUST be interoperable with v1 and v2 Source-filtering Only
- 11. Alberto Ornaghi 2002 IGMP v3 - API Within an IP system, there is (at least conceptually)
- 12. Alberto Ornaghi 2002 IGMP v3 - API parameters "socket" is an implementation-specific parameter used to distinguish
- 13. Alberto Ornaghi 2002 IGMP v3 - API compatibility Previous versions of IGMP did not support source
- 14. Alberto Ornaghi 2002 IGMP v3 - API example For example, suppose one application or process invokes
- 15. Alberto Ornaghi 2002 IGMP v3 - Message format IGMP messages are encapsulated in IPv4 datagrams, with
- 16. Alberto Ornaghi 2002 An implementation of IGMPv3 MUST also support the following three message types, for
- 17. Alberto Ornaghi 2002 IGMP v3 - Message format 0 1 2 3 0 1 2 3
- 18. Alberto Ornaghi 2002 IGMP v3 - Message format The Max Resp Code field specifies the maximum
- 19. Alberto Ornaghi 2002 IGMP v3 - Message format There are three variants of the Query message:
- 20. Alberto Ornaghi 2002 IGMP v3 - Message format 0 1 2 3 0 1 2 3
- 21. Alberto Ornaghi 2002 IGMP v3 - Message format Each Group Record has the following internal format:
- 22. Alberto Ornaghi 2002 Membership Report Message IGMP v3 - Message format There are a number of
- 23. Alberto Ornaghi 2002 Membership Report Message IGMP v3 - Message format Version 3 Reports are sent
- 24. Alberto Ornaghi 2002 IGMP v3 - The protocol (for group members) The all-systems multicast address, 224.0.0.1,
- 25. Alberto Ornaghi 2002 IGMP v3 - The protocol (for group members) Action on Change of Interface
- 26. Alberto Ornaghi 2002 IGMP v3 - The protocol (for group members) Action on Change of Interface
- 27. Alberto Ornaghi 2002 IGMP v3 - The protocol (for group members) Interface Filter State -- EXCLUDE
- 28. Alberto Ornaghi 2002 IGMP v3 - The protocol (for group members) Interface Filter State -- INCLUDE
- 29. Alberto Ornaghi 2002 IGMP v3 - The protocol (for group members) Action on Reception of a
- 30. Alberto Ornaghi 2002 IGMP v3 - The protocol (for group members) Action on Reception of a
- 31. Alberto Ornaghi 2002 IGMP v3 - The protocol (for multicast routers) The purpose of IGMP is
- 32. Alberto Ornaghi 2002 IGMP v3 - The protocol (for multicast routers) If a multicast router has
- 33. Alberto Ornaghi 2002 IGMP v3 - The protocol (for multicast routers) Conditions for IGMP Queries Periodic
- 34. Alberto Ornaghi 2002 IGMP v3 - The protocol (for multicast routers) Group Specific Query To enable
- 35. Alberto Ornaghi 2002 IGMP v3 - The protocol (for multicast routers) Group and Source Specific Query
- 36. Alberto Ornaghi 2002 IGMP v3 - The protocol (for multicast routers) IGMP State Maintained by Multicast
- 37. Alberto Ornaghi 2002 IGMP v3 - The protocol (for multicast routers) Definition of Router Filter-Mode To
- 38. Alberto Ornaghi 2002 IGMP v3 - The protocol (for multicast routers) Action on Reception of Reports
- 39. Alberto Ornaghi 2002 IGMP v3 - The protocol (for multicast routers) Action on Reception of Queries
- 40. Alberto Ornaghi 2002 IGMP v3 - Interoperation with older version IGMP version 3 hosts and routers
- 41. Alberto Ornaghi 2002 IGMP v3 - Interoperation with older version Group Member Behavior In the Presence
- 42. Alberto Ornaghi 2002 IGMP v3 - Interoperation with older version Multicast Router Behavior In the Presence
- 43. Alberto Ornaghi 2002 IGMP v3 - Interoperation with older version Multicast Router Behavior In the Presence
- 44. Alberto Ornaghi 2002 IGMP v3 - Interoperation with older version Multicast Router Behavior When Group Compatibility
- 45. Alberto Ornaghi 2002 IGMP v3 - Timers Most of these timers are configurable. If non-default settings
- 46. Alberto Ornaghi 2002 IGMP v3 - Timers Query Response Interval The Max Response Time used to
- 47. Alberto Ornaghi 2002 IGMP v3 - Timers Other Querier Present Interval The Other Querier Present Interval
- 48. Alberto Ornaghi 2002 IGMP v3 - Timers Older Version Querier Present Timeout The Older Version Querier
- 49. Alberto Ornaghi 2002 IGMP v3 - Configuring Timers This section is meant to provide advice to
- 50. Alberto Ornaghi 2002 IGMP v3 - Configuring Timers Query Interval The overall level of periodic IGMP
- 51. Alberto Ornaghi 2002 IGMP v3 - Security IPSEC in Authentication Header mode [AH] may be used
- 52. Alberto Ornaghi 2002 IGMP v3 - Security Query Message A forged Query message from a machine
- 53. Alberto Ornaghi 2002 IGMP v3 - Security Current-State Report messages A forged Version 1 Report Message
- 54. Alberto Ornaghi 2002 IGMP v3 - Security State-Change Report messages A forged State-Change Report message will
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