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IGMP Commands
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IGMP Commands
Internet Group Management Protocol (IGMP) is the multicast group
membership discovery protocol used for IPv4 multicast groups. Three
versions of IGMP exist. Versions one and two are widely deployed. Since
IGMP is used between end systems (often desktops) and the multicast router,
the version of IGMP required depends on the end-user operating system
being supported. Any implementation of IGMP must support all earlier
versions.
The following list describes the basic operation of IGMP, common to all
versions. A multicast router can act as both an IGMP host and an IGMP
router and as a result can respond to its own IGMP messages. The
PowerConnect implementation of IGMPv3 supports the multicast router
portion of the protocol (that is, not the host portion). It is backward
compatible with IGMPv1 and IGMPv2.
• One router periodically broadcasts IGMP Query messages onto the
network.
• Hosts respond to the Query messages by sending IGMP Report messages
indicating their group memberships.
• All routers receive the Report messages and note the memberships of hosts
on the network.
• If a router does not receive a Report message for a particular group for a
period of time, the router assumes there are no more members of the
group on the network.
All IGMP messages are raw IP data grams and are sent to multicast group
addresses, with a time to leave (TTL) of 1. Since raw IP does not provide
reliable transport, some messages are sent multiple times to aid reliability.
IGMPv3 is a major revision of the protocol and provides improved group
membership latency. When a host joins a new multicast group on an
interface, it immediately sends an unsolicited IGMP Report message for that
group.
2CSPC4.XCT-SWUM2XX1.book Page 925 Monday, October 3, 2011 11:05 AM
Содержание PowerConnect 7000 Series
Страница 74: ...74 Contents 2CSPC4 XCT SWUM2XX1 book Page 74 Monday October 3 2011 11 05 AM ...
Страница 164: ...164 Command Groups 2CSPC4 XCT SWUM2XX1 book Page 164 Monday October 3 2011 11 05 AM ...
Страница 238: ...238 Layer 2 Switching Commands 2CSPC4 XCT SWUM2XX1 book Page 238 Monday October 3 2011 11 05 AM ...
Страница 266: ...266 AAA Commands 2CSPC4 XCT SWUM2XX1 book Page 266 Monday October 3 2011 11 05 AM ...
Страница 316: ...316 Auto VoIP Commands 2CSPC4 XCT SWUM2XX1 book Page 316 Monday October 3 2011 11 05 AM ...
Страница 344: ...344 DHCP Layer 2 Relay Commands 2CSPC4 XCT SWUM2XX1 book Page 344 Monday October 3 2011 11 05 AM ...
Страница 352: ...352 DHCP Management Interface Commands 2CSPC4 XCT SWUM2XX1 book Page 352 Monday October 3 2011 11 05 AM ...
Страница 368: ...368 DHCP Snooping Commands 2CSPC4 XCT SWUM2XX1 book Page 368 Monday October 3 2011 11 05 AM ...
Страница 382: ...382 Dynamic ARP Inspection Commands 2CSPC4 XCT SWUM2XX1 book Page 382 Monday October 3 2011 11 05 AM ...
Страница 434: ...434 Ethernet Configuration Commands 2CSPC4 XCT SWUM2XX1 book Page 434 Monday October 3 2011 11 05 AM ...
Страница 454: ...454 Ethernet CFM Commands 2CSPC4 XCT SWUM2XX1 book Page 454 Monday October 3 2011 11 05 AM ...
Страница 468: ...468 Green Ethernet Commands 2CSPC4 XCT SWUM2XX1 book Page 468 Monday October 3 2011 11 05 AM ...
Страница 532: ...532 IPv6 Access List Commands 2CSPC4 XCT SWUM2XX1 book Page 532 Monday October 3 2011 11 05 AM ...
Страница 544: ...544 IPv6 MLD Snooping Commands 2CSPC4 XCT SWUM2XX1 book Page 544 Monday October 3 2011 11 05 AM ...
Страница 558: ...558 IP Source Guard Commands 2CSPC4 XCT SWUM2XX1 book Page 558 Monday October 3 2011 11 05 AM ...
Страница 570: ...570 iSCSI Optimization Commands 2CSPC4 XCT SWUM2XX1 book Page 570 Monday October 3 2011 11 05 AM ...
Страница 578: ...578 Link Dependency Commands 2CSPC4 XCT SWUM2XX1 book Page 578 Monday October 3 2011 11 05 AM ...
Страница 606: ...606 LLDP Commands 2CSPC4 XCT SWUM2XX1 book Page 606 Monday October 3 2011 11 05 AM ...
Страница 700: ...700 QoS Commands 2CSPC4 XCT SWUM2XX1 book Page 700 Monday October 3 2011 11 05 AM ...
Страница 728: ...728 RADIUS Commands 2CSPC4 XCT SWUM2XX1 book Page 728 Monday October 3 2011 11 05 AM ...
Страница 808: ...808 VLAN Commands 2CSPC4 XCT SWUM2XX1 book Page 808 Monday October 3 2011 11 05 AM ...
Страница 814: ...814 Voice VLAN Commands 2CSPC4 XCT SWUM2XX1 book Page 814 Monday October 3 2011 11 05 AM ...
Страница 848: ...848 802 1x Commands 2CSPC4 XCT SWUM2XX1 book Page 848 Monday October 3 2011 11 05 AM ...
Страница 850: ...850 Layer 3 Commands 2CSPC4 XCT SWUM2XX1 book Page 850 Monday October 3 2011 11 05 AM ...
Страница 912: ...912 DHCPv6 Commands 2CSPC4 XCT SWUM2XX1 book Page 912 Monday October 3 2011 11 05 AM ...
Страница 920: ...920 DVMRP Commands 2CSPC4 XCT SWUM2XX1 book Page 920 Monday October 3 2011 11 05 AM ...
Страница 946: ...946 IGMP Proxy Commands 2CSPC4 XCT SWUM2XX1 book Page 946 Monday October 3 2011 11 05 AM ...
Страница 1062: ...1062 IPv6 Routing Commands 2CSPC4 XCT SWUM2XX1 book Page 1062 Monday October 3 2011 11 05 AM ...
Страница 1066: ...1066 Loopback Interface Commands 2CSPC4 XCT SWUM2XX1 book Page 1066 Monday October 3 2011 11 05 AM ...
Страница 1174: ...1174 OSPF Commands 2CSPC4 XCT SWUM2XX1 book Page 1174 Monday October 3 2011 11 05 AM ...
Страница 1234: ...1234 OSPFv3 Commands 2CSPC4 XCT SWUM2XX1 book Page 1234 Monday October 3 2011 11 05 AM ...
Страница 1244: ...1244 Router Discovery Protocol Commands 2CSPC4 XCT SWUM2XX1 book Page 1244 Monday October 3 2011 11 05 AM ...
Страница 1260: ...1260 Routing Information Protocol Commands 2CSPC4 XCT SWUM2XX1 book Page 1260 Monday October 3 2011 11 05 AM ...
Страница 1292: ...1292 Virtual Router Redundancy Protocol Commands 2CSPC4 XCT SWUM2XX1 book Page 1292 Monday October 3 2011 11 05 AM ...
Страница 1294: ...1294 Utility Commands 2CSPC4 XCT SWUM2XX1 book Page 1294 Monday October 3 2011 11 05 AM ...
Страница 1304: ...1304 Auto Install Commands 2CSPC4 XCT SWUM2XX1 book Page 1304 Monday October 3 2011 11 05 AM ...
Страница 1338: ...1338 Captive Portal Commands 2CSPC4 XCT SWUM2XX1 book Page 1338 Monday October 3 2011 11 05 AM ...
Страница 1348: ...1348 CLI Macro Commands 2CSPC4 XCT SWUM2XX1 book Page 1348 Monday October 3 2011 11 05 AM ...
Страница 1366: ...1366 Clock Commands 2CSPC4 XCT SWUM2XX1 book Page 1366 Monday October 3 2011 11 05 AM ...
Страница 1372: ...1372 Command Line Configuration Scripting Commands 2CSPC4 XCT SWUM2XX1 book Page 1372 Monday October 3 2011 11 05 AM ...
Страница 1394: ...1394 Configuration and Image File Commands 2CSPC4 XCT SWUM2XX1 book Page 1394 Monday October 3 2011 11 05 AM ...
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Страница 1478: ...1478 RMON Commands 2CSPC4 XCT SWUM2XX1 book Page 1478 Monday October 3 2011 11 05 AM ...
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Страница 1578: ...1578 Syslog Commands 2CSPC4 XCT SWUM2XX1 book Page 1578 Monday October 3 2011 11 05 AM ...
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Страница 1642: ...1642 System Management Commands 2CSPC4 XCT SWUM2XX1 book Page 1642 Monday October 3 2011 11 05 AM ...
Страница 1646: ...1646 Telnet Server Commands 2CSPC4 XCT SWUM2XX1 book Page 1646 Monday October 3 2011 11 05 AM ...
Страница 1648: ...1648 Terminal Length Commands 2CSPC4 XCT SWUM2XX1 book Page 1648 Monday October 3 2011 11 05 AM ...
Страница 1686: ...1686 Web Server Commands 2CSPC4 XCT SWUM2XX1 book Page 1686 Monday October 3 2011 11 05 AM ...
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