ZyXEL Communications NVG2053, Руководство пользователя

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Chapter 9 LAN
NVG2053 User’s Guide
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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
NVG2053 supports both IGMP version 1 (IGMP-v1) and IGMP version 2 (IGMP-
v2).
At start up, the NVG2053 queries all directly connected networks to gather group
membership. After that, the NVG2053 periodically updates this information. IP
multicasting can be enabled/disabled on the NVG2053 LAN and/or WAN interfaces
in the Web Configurator.
9.4 LAN IP Screen
Use this screen to change the IP address for your NVG2053. Click Network >
LAN > IP.
Figure 52 Network > LAN > IP
The following table describes the labels in this screen.
Table 35 Network > LAN > IP
LABEL DESCRIPTION
IP Address Type the IP address of your NVG2053 in dotted decimal notation.
IP Subnet Mask The subnet mask specifies the network number portion of an IP
address. Select a subnet mask from the drop-down list.
Apply Click Apply to save your changes back to the NVG2053.
Cancel Click Cancel to begin configuring this screen afresh.