ZyXEL Communications XS3800-28, Руководство пользователя, Страница: 720 / 789

Chapter 88 Networked AV Mode
XS3800-28 User’s Guide
720
88.25 Multicast
Traditionally, IP packets are transmitted in one of either two ways
–
Unicast (1 sender to 1 recipient) or
Broadcast (1 sender to everybody on the network). Multicast delivers IP packets to just a group of hosts
on the network.
IGMP (Internet Group Management Protocol) is a network-layer protocol used to establish membership
in a multicast group
–
it is not used to carry user data. Refer to RFC 1112, RFC 2236 and RFC 3376 for
information on IGMP versions 1, 2 and 3 respectively.
This section shows you how to configure various multicast features.
88.25.1 What You Can Do
• Use the IPv4 Multicast Status screen ( Section 88.26 on page 720 ) to view multicast group information.
• Use the IGMP Snooping screen ( Section 88.27 on page 721 ) to enable IGMP snooping to forward
group multicast traffic only to ports that are members of that group.
• Use the IGMP Snooping VLAN screen ( Section 88.28 on page 724 ) to perform IGMP snooping on up to
16 VLANs.
• Use the IGMP Filtering Profile screen ( Section 88.29 on page 726 ) to specify a range of multicast
groups that clients connected to the Switch are able to join.
88.26 IPv4 Multicast Status
Click SWITCHING > Multicast > IPv4 Multicast Status to display the screen as shown. This screen shows the
IPv4 multicast group information.
Figure 574 SWITCHING > Multicast > IPv4 Multicast Status
The following table describes the labels in this screen.
Table 388 SWITCHING > Multicast > IPv4 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.
In Stacking mode, the first number represents the slot and the second is the port number.
Multicast Group This field displays IP multicast group addresses.