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Topic: Internet group management protocol

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	Internet Group Management Protocol - Wikipedia, the free encyclopedia
		The Internet Group Management Protocol (IGMP) is used between IP hosts and their immediate neighbor multicast agents to support the creation of transient groups, the addition and deletion of members of a group, and the periodic confirmation of group membership.
		IGMP [RFC 1112] is a protocol used between hosts and gateways on a single network to establish hosts' membership in particular multicast groups.
		IGMP is a protocol used between hosts and multicast routers on a single physical network to establish hosts' membership in particular multicast groups.
	en.wikipedia.org /wiki/Internet_Group_Management_Protocol (5369 words)

	RFC 2236 (rfc2236) - Internet Group Management Protocol, Version 2
		Group Address In a Membership Query message, the group address field is set to zero when sending a General Query, and set to the group address being queried when sending a Group-Specific Query.
		Leave Group messages are addressed to the all-routers group because other group members have no need to know that a host has left the group, but it does no harm to address the message to the group.
		The group address in the IGMP header must either be zero (a General Query) or a valid multicast group address (a Group-Specific Query).
	www.faqs.org /rfcs/rfc2236.html (5591 words)

	Chapter 13. IGMP: Internet Group Management Protocol (Site not responding. Last check: 2007-10-12)
		IGMP messages are specified in the IP datagram with a protocol value of 2.
		IGMP messages are used by multicast routers to keep track of group membership on each of the router's physically attached networks.
		Notice that the group 224.0.0.4 is reported, in addition to the two groups that we explicitly joined, because as long as the routing daemon is running, it belongs to this group.
	www.wuppy.net.ru /books/TCP_IP_Illustrated/igmp_int.htm (2466 words)

	Internet Protocol (IP) Multicast
		Internet Protocol (IP) multicast is a bandwidth-conserving technology that reduces traffic by simultaneously delivering a single stream of information to thousands of corporate recipients and homes.
		IGMP is used to dynamically register individual hosts in a multicast group on a particular LAN.
		IGMP snooping requires the LAN switch to examine, or snoop, some Layer 3 information in the IGMP packets sent between the hosts and the router.
	www.cisco.com /univercd/cc/td/doc/cisintwk/ito_doc/ipmulti.htm (4779 words)

	IGMP (Internet Group Management Protocol) from FutureSoft (Site not responding. Last check: 2007-10-12)
		IGMP is the protocol used by IPv4 systems to report their IP multicast group memberships to neighboring multicast routers.
		Version 3 of IGMP adds support for "source filtering", that is, the ability for a system to report interest in receiving packets only from specific source addresses, or from all but specific source addresses, sent to a particular multicast address.
		This information is used by multicast routing protocols to avoid delivering multicast packets from specific sources to networks where there are no interested receivers.
	www.futsoft.com /igmpv3.htm (240 words)

	RFC 2933 (rfc2933) - Internet Group Management Protocol MIB
		Network Working Group K. McCloghrie Request for Comments: 2933 cisco Systems Category: Standards Track D. Farinacci Procket Networks D. Thaler Microsoft October 2000 Internet Group Management Protocol MIB Status of this Memo This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements.
		A second version of the SNMP message protocol, which is not an Internet standards track protocol, is called SNMPv2c and described in RFC 1901 [9] and RFC 1906 [10].
		IGMP requires that all routers on a LAN be configured to run the same version of IGMP.
	www.faqs.org /rfcs/rfc2933.html (1692 words)

	[No title]
		If any group records expressing EXCLUDE mode interest in the group are received within the interval, the group timer for the group is updated and the suggestion to the routing protocol to forward the group stands without any interruption.
		Note: If a group specific query is scheduled to be transmitted at the same time as a group and source specific query for the same group, then transmission of the group and source specific message with the "Suppress Router-Side Processing" bit set may be suppressed.
		Group Membership Interval The Group Membership Interval is the amount of time that must pass before a multicast router decides there are no more members of a group or a particular source on a network.
	www.ietf.org /rfc/rfc3376.txt (8308 words)

	[No title]
		Routers that are members of multicast groups are expected to behave Fenner Standards Track [Page 1] RFC 2236 Internet Group Management Protocol November 1997 as hosts as well as routers, and may even respond to their own queries.
		If the host receives another Fenner Standards Track [Page 4] RFC 2236 Internet Group Management Protocol November 1997 host's Report (version 1 or 2) while it has a timer running, it stops its timer for the specified group and does not send a Report, in order to suppress duplicate Reports.
		Fenner Standards Track [Page 7] RFC 2236 Internet Group Management Protocol November 1997 There are five significant events that can cause IGMP state transitions: - "join group" occurs when the host decides to join the group on the interface.
	www.isi.edu /in-notes/rfc2236.txt (5613 words)

	APPENDIX I. INTERNET GROUP MANAGEMENT PROTOCOL (IGMP)
		APPENDIX I. The Internet Group Management Protocol (IGMP) is used by IP hosts to report their host group memberships to any immediately-neighboring multicast routers.
		Group Address In a Host Membership Query message, the group address field is zeroed when sent, ignored when received.
		To be valid, the Report message must be at least 8 octets long, have a correct IGMP checksum, and contain the same IP host group address in its IP destination field and its IGMP group address field.
	www.freesoft.org /CIE/RFC/1112/18.htm (1480 words)

	Cisco - Multicast in a Campus Network: CGMP and IGMP Snooping
		IGMP is a standard defined in RFC1112 for IGMPv1, in RFC2236 for IGMPv2 and in RFC3376 for IGMPv3.
		When a switch is running IGMP snooping, it intercepts the IGMP packets and populates the static Layer 2 (L2) forwarding table based on the content of the intercepted packets.
		IGMP snooping, as implied by the name, is a feature that allows the switch to "listen in" on the IGMP conversation between hosts and routers.
	www.cisco.com /warp/public/473/22.html (5758 words)

	[No title]
		In particular, it describes objects used for managing the Internet McCloghrie, et al.
		Standards Track [Page 2] RFC 2933 Internet Group Management Protocol MIB October 2000 equivalent, except where objects or events are omitted because no translation is possible (use of Counter64).
		Standards Track [Page 14] RFC 2933 Internet Group Management Protocol MIB October 2000 It is then a customer/user responsibility to ensure that the SNMP entity giving access to this MIB, is properly configured to give access to those objects only to those principals (users) that have legitimate rights to access them.
	www.ietf.org /rfc/rfc2933.txt (1889 words)

	Internet Group Management Protocol Software, DC-IGMP, from Data Connection
		DC-IGMP is an implementation of Internet Group Management Protocol (IGMP) source code designed explicitly to support the scalability, availability and functional requirements of OEMs building devices for next generation networks.
		The IGMP Router component is an MGMD Router in the Multicast IP Routing architecture.
		The IGMP Proxy component is an MRPM in the Multicast IP Routing architecture.
	www.dataconnection.com /multicast/dc-igmp.htm (340 words)

	Embedded Software Development: Fusion IGMP - Internet Group Management Protocol
		Fusion TCP/IP Fusion Embedded IGMP (Internet Group Management Protocol)
		Fusion IGMPv2 software runs between hosts and their immediately neighboring multicast routers; the mechanisms of the protocol allow a host to inform its local router that it wishes to receive transmissions addressed to a specific multicast group.
		Based on group membership information learned from the IGMP, a router is able to determine which if any multicast traffic needs to be forwarded to each of its "leaf" sub-networks.
	www.dspos.com /fusion_net/fusion_igmp.htm (162 words)

	IGMP ( Internet Group Management Protocol) Definition
		Browse Bitpipe Dictionary: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Other
		Standards > Network Protocols > Routing Protocols >
		An Internet protocol that provides a way for an Internet computer to report its multicast group membership to adjacent routers.
	www.bitpipe.com /tlist/IGMP.html (195 words)

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