Static Multicast Forward Setup; Static Multicast Forwarding Overview - ZyXEL Communications XS3800-28 User Manual

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H A P T E R
Static Multicast Forward
Setup
Use these screens to configure static multicast address forwarding.

11.1 Static Multicast Forwarding Overview

A multicast MAC address is the MAC address of a member of a multicast group. A static multicast
address is a multicast MAC address that has been manually entered in the multicast table. Static
multicast addresses do not age out. Static multicast forwarding allows you (the administrator) to forward
multicast frames to a member without the member having to join the group first.
If a multicast group has no members, then the switch will either flood the multicast frames to all ports or
drop them. You can configure this in the Advanced Application > Multicast > IPv4 Multicast > IGMP
Snooping screen (see Section 25.3.1 on page 257). Figure 112 shows such unknown multicast frames
flooded to all ports. With static multicast forwarding, you can forward these multicasts to port(s) within a
VLAN group. Figure 113 shows frames being forwarded to devices connected to port 3. Figure 114 shows
frames being forwarded to ports 2 and 3 within VLAN group 4.
Figure 112 No Static Multicast Forwarding
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