ZyXEL Communications Dimension GS-3012, Руководство пользователя, Страница: 142 / 259

GS-3012/GS-3012F User’s Guide
20-2 Multicast
packets passing through it, picks out the group registration information, and configures multicasting accordingly.
IGMP snooping allows the switch to learn multicast groups without you having to manually configure them.
The switch forwards multicast traffic destined for multicast groups (that it has learned from IGMP snooping or that
you have manually configured) to ports that are members of that group. The switch discards multicast traffic
destined for multicast groups that it does not know. IGMP snooping generates no additional network traffic,
allowing you to significantly reduce multicast traffic passing through your switch.
20.2 Multicast Status
Click Advanced Applications and Multicast to display the screen as shown. This screen shows the multicast group
information.
Figure 20-1 Multicast Status
The following table describes the labels in this screen.
Table 20-1 Multicast Status
LABEL DESCRIPTION
Index This is the index number of the entry.
VID This field displays the multicast VLAN ID.
Port This field displays the port number that belongs to the multicast group.
Multicast Group This field displays IP multicast group addresses.
20.3 Multicast Setup
Click Advanced Applications , Multicast and the Multicast Setting link to display the screen as shown.