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Prestige 660RU-Tx Series User’s Guide
59
Chapter 5 LAN Setup
5.4.4 Multicast
Traditionally, IP packets are transmitted in one of either two ways - Unicast (1 sender - 1
recipient) or Broadcast (1 sender - everybody on the network). Multicast delivers IP packets to
a group of hosts on the network - not everybody and not just 1.
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. IGMP version 2 (RFC
2236) is an improvement over version 1 (RFC 1112) but IGMP version 1 is still in wide use. If
you would like to read more detailed information about interoperability between IGMP
version 2 and version 1, please see sections 4 and 5 of RFC 2236. The class D IP address is
used to identify host groups and can be in the range 224.0.0.0 to 239.255.255.255. The address
224.0.0.0 is not assigned to any group and is used by IP multicast computers. The address
224.0.0.1 is used for query messages and is assigned to the permanent group of all IP hosts
(including gateways). All hosts must join the 224.0.0.1 group in order to participate in IGMP.
The address 224.0.0.2 is assigned to the multicast routers group.
The Prestige supports both IGMP version 1 (
IGMP-v1
) and IGMP version 2 (
IGMP-v2
). At
start up, the Prestige queries all directly connected networks to gather group membership.
After that, the Prestige periodically updates this information. IP multicasting can be enabled/
disabled on the Prestige LAN and/or WAN interfaces in the web configurator (
LAN
;
WAN
).
Select
None
to disable IP multicasting on these interfaces.
5.5 Any IP
Traditionally, you must set the IP addresses and the subnet masks of a computer and the
Prestige to be in the same subnet to allow the computer to access the Internet (through the
Prestige). In cases where your computer is required to use a static IP address in another
network, you may need to manually configure the network settings of the computer every time
you want to access the Internet via the Prestige.
With the Any IP feature and NAT enabled, the Prestige allows a computer to access the
Internet without changing the network settings (such as IP address and subnet mask) of the
computer, when the IP addresses of the computer and the Prestige are not in the same subnet.
Whether a computer is set to use a dynamic or static (fixed) IP address, you can simply
connect the computer to the Prestige and access the Internet.
The following figure depicts a scenario where a computer is set to use a static private IP
address in the corporate environment. In a residential house where a Prestige is installed, you
can still use the computer to access the Internet without changing the network settings, even
when the IP addresses of the computer and the Prestige are not in the same subnet.
Содержание ADSL2+ Ethernet/USB Gateway 660RU-Tx Series
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Страница 30: ...Prestige 660RU Tx Series User s Guide 29 Introduction to DSL ...
Страница 38: ...Prestige 660RU Tx Series User s Guide 37 Chapter 1 Getting To Know Your Prestige ...
Страница 56: ...Prestige 660RU Tx Series User s Guide 55 Chapter 4 Password Setup ...
Страница 64: ...Prestige 660RU Tx Series User s Guide 63 Chapter 5 LAN Setup ...
Страница 74: ...Prestige 660RU Tx Series User s Guide 73 Chapter 6 WAN Setup ...
Страница 86: ...Prestige 660RU Tx Series User s Guide 85 Chapter 7 Network Address Translation NAT Screens ...
Страница 94: ...Prestige 660RU Tx Series User s Guide 93 Chapter 10 Remote Management Configuration ...
Страница 108: ...Prestige 660RU Tx Series User s Guide 107 Chapter 11 Universal Plug and Play UPnP ...
Страница 124: ...Prestige 660RU Tx Series User s Guide 123 Chapter 13 Introducing the SMT ...
Страница 128: ...Prestige 660RU Tx Series User s Guide 127 Chapter 14 Menu 1 General Setup ...
Страница 132: ...Prestige 660RU Tx Series User s Guide 131 Chapter 15 Menu 2 WAN Backup Setup ...
Страница 136: ...Prestige 660RU Tx Series User s Guide 135 Chapter 16 Menu 3 LAN Setup ...
Страница 158: ...Prestige 660RU Tx Series User s Guide 157 Chapter 19 Static Route Setup ...
Страница 162: ...Prestige 660RU Tx Series User s Guide 161 Chapter 20 Bridging Setup ...
Страница 178: ...Prestige 660RU Tx Series User s Guide 177 Chapter 21 Network Address Translation NAT ...
Страница 206: ...Prestige 660RU Tx Series User s Guide 205 Chapter 24 System Information and Diagnosis ...
Страница 218: ...Prestige 660RU Tx Series User s Guide 217 Chapter 25 Firmware and Configuration File Maintenance ...
Страница 224: ...Prestige 660RU Tx Series User s Guide 223 Chapter 26 System Maintenance ...
Страница 228: ...Prestige 660RU Tx Series User s Guide 227 Chapter 27 Remote Management ...
Страница 238: ...Prestige 660RU Tx Series User s Guide 237 Chapter 28 IP Policy Routing ...
Страница 242: ...Prestige 660RU Tx Series User s Guide 241 Chapter 29 Call Scheduling ...
Страница 260: ...Prestige 660RU Tx Series User s Guide 259 Appendix B ...
Страница 268: ...Prestige 660RU Tx Series User s Guide 267 Appendix C ...
Страница 272: ...Prestige 660RU Tx Series User s Guide 271 Appendix E ...
Страница 274: ...Prestige 660RU Tx Series User s Guide 273 Appendix F ...
Страница 280: ...Prestige 660RU Tx Series User s Guide 279 Appendix G ...