Chapter 8 WAN
EMG3425-Q10A User’s Guide
59
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.
Figure 26
Multicast Example
In the multicast example above, systems A and D comprise one multicast group. In multicasting,
the server only needs to send one data stream and this is delivered to systems A and D.
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. The EMG3425-Q10A supports both IGMP
version 1 (
IGMP-v1
) and IGMP version 2 (
IGMP-v2
).
At start up, the EMG3425-Q10A queries all directly connected networks to gather group
membership. After that, the EMG3425-Q10A periodically updates this information. IP multicasting
can be enabled/disabled on the EMG3425-Q10A WAN interface in the Web Configurator (
WAN
).
Select
None
to disable IP multicasting on these interfaces.
8.4 Management WAN
Use this screen to view, change, or add your EMG3425-Q10A’s Internet access settings. Click
Configuration
>
Network
>
WAN
. The following screen opens.
Figure 27
Network > WAN > Management WAN
Содержание EMG3425-Q10A
Страница 11: ...11 PART I User s Guide...
Страница 18: ...Chapter 1 Introduction EMG3425 Q10A User s Guide 18 Figure 4 Wall Mounting Example...
Страница 49: ...Chapter 6 Tutorials EMG3425 Q10A User s Guide 49...
Страница 50: ...50 PART II Technical Reference...
Страница 239: ...Appendix D Legal Information EMG3425 Q10A User s Guide 239 Environmental Product Declaration...