VSG1432-B101 Series User’s Guide
199
C
H A P T E R
1 4
IGMP
14.1 Overview
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, RFC 2236, and RFC 3376 for information on IGMP versions 1, 2, and 3
respectively.
14.1.1 What You Can Do in this Chapter
• Use the
IGMP General
screen to configure general IGMP proxy and IGMP
packet processing settings (
Section 14.2 on page 202
).
• Use the
IGMP Filter
screens to control IGMP access (
Section 14.3 on page
204
).
• Use the
IGMP ACL
screens to block or allow access to specific multicast media
channels (
Section 14.4 on page 209
).
14.1.2 What You Need to Know
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).
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
Содержание VSG1432-B101 - V1.10
Страница 2: ......
Страница 8: ...Safety Warnings VSG1432 B101 Series User s Guide 8 ...
Страница 10: ...Contents Overview VSG1432 B101 Series User s Guide 10 ...
Страница 20: ...Table of Contents VSG1432 B101 Series User s Guide 20 ...
Страница 21: ...21 PART I User s Guide ...
Страница 22: ...22 ...
Страница 40: ...Chapter 2 The Web Configurator VSG1432 B101 Series User s Guide 40 ...
Страница 67: ...67 PART II Technical Reference ...
Страница 68: ...68 ...
Страница 74: ...Chapter 5 Network Map and Status Screens VSG1432 B101 Series User s Guide 74 ...
Страница 146: ...Chapter 8 Home Networking VSG1432 B101 Series User s Guide 146 ...
Страница 150: ...Chapter 9 Static Routing VSG1432 B101 Series User s Guide 150 ...
Страница 174: ...Chapter 11 Policy Forwarding VSG1432 B101 Series User s Guide 174 ...
Страница 192: ...Chapter 12 Network Address Translation NAT VSG1432 B101 Series User s Guide 192 ...
Страница 198: ...Chapter 13 Dynamic DNS Setup VSG1432 B101 Series User s Guide 198 ...
Страница 224: ...Chapter 16 Firewall VSG1432 B101 Series User s Guide 224 ...
Страница 230: ...Chapter 18 Parental Control VSG1432 B101 Series User s Guide 230 ...
Страница 278: ...Chapter 25 Traffic Status VSG1432 B101 Series User s Guide 278 ...
Страница 282: ...Chapter 26 IGMP Status VSG1432 B101 Series User s Guide 282 ...
Страница 290: ...Chapter 28 Remote Management VSG1432 B101 Series User s Guide 290 ...
Страница 294: ...Chapter 29 Time Settings VSG1432 B101 Series User s Guide 294 ...
Страница 298: ...Chapter 30 Logs Setting VSG1432 B101 Series User s Guide 298 ...
Страница 314: ...Chapter 34 Troubleshooting VSG1432 B101 Series User s Guide 314 ...
Страница 344: ...Appendix A Setting up Your Computer s IP Address VSG1432 B101 Series User s Guide 344 ...
Страница 354: ...Appendix B IP Addresses and Subnetting VSG1432 B101 Series User s Guide 354 ...
Страница 364: ...Appendix C Pop up Windows JavaScripts and Java Permissions VSG1432 B101 Series User s Guide 364 ...
Страница 380: ...Appendix D Wireless LANs VSG1432 B101 Series User s Guide 380 ...
Страница 408: ...Index VSG1432 B101 Series User s Guide 408 ...