ZyXEL Communications MWR222 - V1.0 Guia do Utilizador Página 103

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MWR211 User’s Guide
103
Figure 55 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
MWR222 supports both IGMP version 1 (IGMP-v1) and IGMP version 2 (IGMP-
v2).
At start up, the MWR222 queries all directly connected networks to gather group
membership. After that, the MWR222 periodically updates this information. IP
multicasting can be enabled/disabled on the MWR222 LAN and/or WAN interfaces
in the Web Configurator (LAN; WAN). Select None to disable IP multicasting on
these interfaces.
10.4 Internet Connection
Use this screen to change your MWR222s Internet access settings. Click WAN
from the Configuration menu. The screen differs according to the encapsulation
you choose.
10.4.1 Ethernet Encapsulation
This screen displays when you select Ethernet encapsulation.
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