SAM1316-22 User’s Guide
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IGMP
This chapter describes the IGMP screens.
18.1 IGMP
Traditionally, IP packets are transmitted in one of either two ways - Unicast (1
sender to 1 recipient) or Broadcast (1 sender to everybody on the network).
Multicast delivers IP packets to just a group of hosts on the network.
IGMP (Internet Group Multicast Protocol) is a network-layer protocol used to
establish membership in a multicast group - it is not used to carry user data. See
RFC 1112 and RFC 2236 for information on IGMP versions 1 and 2, respectively.
18.2 IP Multicast Addresses
In IPv4, a multicast address allows a device to send packets to a specific group of
hosts (multicast group) in a different sub-network. A multicast IP address
represents a traffic receiving group, not individual receiving devices. IP addresses
in the Class D range (224.0.0.0 to 239.255.255.255) are used for IP multicasting.
Certain IP multicast numbers are reserved by IANA for special purposes (see the
IANA web site for more information).
18.2.1 IGMP Snooping
A layer-2 switch can passively snoop on IGMP Query, Report and Leave (IGMP
version 2) packets transferred between IP multicast routers/switches and IP
multicast hosts to learn the IP multicast group membership. It checks IGMP
packets passing through it, picks out the group registration information, and
configures multicasting accordingly. IGMP snooping allows the SAM1316-22 to
learn multicast groups without you having to manually configure them.
The SAM1316-22 forwards multicast traffic destined for multicast groups (that it
has learned from IGMP snooping or that you have manually configured) to ports
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Страница 8: ...SAM1316 22 User s Guide 8...
Страница 26: ...SAM1316 22 User s Guide 26 Index 459...
Страница 27: ...27 PART I User s Guide...
Страница 28: ...28...
Страница 32: ...Chapter 1 Getting to Know the SAM1316 22 SAM1316 22 User s Guide 32...
Страница 35: ...Chapter 2 Installing and Removing the SAM1316 22 SAM1316 22 User s Guide 35...
Страница 36: ...Chapter 2 Installing and Removing the SAM1316 22 SAM1316 22 User s Guide 36...
Страница 43: ...43 PART II Technical Reference...
Страница 44: ...44...
Страница 74: ...Chapter 7 System Information SAM1316 22 User s Guide 74...
Страница 122: ...Chapter 14 xDSL Profiles Setup SAM1316 22 User s Guide 122...
Страница 128: ...Chapter 15 xDSL Line Data SAM1316 22 User s Guide 128...
Страница 152: ...Chapter 18 IGMP SAM1316 22 User s Guide 152...
Страница 164: ...Chapter 21 Filtering SAM1316 22 User s Guide 164...
Страница 174: ...Chapter 23 Spanning Tree Protocol SAM1316 22 User s Guide 174...
Страница 180: ...Chapter 24 Port Authentication SAM1316 22 User s Guide 180...
Страница 188: ...Chapter 26 DHCP Relay SAM1316 22 User s Guide 188...
Страница 202: ...Chapter 28 2684 Routed Mode SAM1316 22 User s Guide 202...
Страница 212: ...Chapter 30 DSCP SAM1316 22 User s Guide 212...
Страница 224: ...Chapter 32 ACL SAM1316 22 User s Guide 224...
Страница 228: ...Chapter 34 Syslog SAM1316 22 User s Guide 228...
Страница 236: ...Chapter 35 Access Control SAM1316 22 User s Guide 236...
Страница 242: ...Chapter 37 Maximum MTU Size SAM1316 22 User s Guide 242...
Страница 246: ...Chapter 38 PVC Upstream Limit SAM1316 22 User s Guide 246...
Страница 260: ...Chapter 41 Alarm SAM1316 22 User s Guide 260...
Страница 270: ...Chapter 44 MAC Table SAM1316 22 User s Guide 270...
Страница 332: ...Chapter 50 IEEE 802 1Q Tagged VLAN Commands SAM1316 22 User s Guide 332...
Страница 356: ...Chapter 52 IGMP Commands SAM1316 22 User s Guide 356...
Страница 364: ...Chapter 54 OUI Filter Commands SAM1316 22 User s Guide 364...
Страница 368: ...Chapter 55 Packet Filter Commands SAM1316 22 User s Guide 368...
Страница 374: ...Chapter 56 IP Commands SAM1316 22 User s Guide 374...
Страница 384: ...Chapter 58 SNMP SAM1316 22 User s Guide 384...
Страница 428: ...Chapter 60 Virtual Channel Management SAM1316 22 User s Guide 428...
Страница 444: ...Chapter 62 Troubleshooting SAM1316 22 User s Guide 444...
Страница 454: ...Chapter 63 Specifications SAM1316 22 User s Guide 454...
Страница 458: ...SAM1316 22 User s Guide 458...