Chapter 11 Static Multicast Forwarding
GS2220 Series User’s Guide
156
C HAPTER 11
Sta tic Multic a st Fo rwa rding
11.1 O ve rvie w
This chapter discusses how to configure forwarding rules based on multicast MAC addresses of devices
on your network.
Use these screens to configure static multicast address forwarding.
11.1.1 Wha t You C a n Do
Use the Sta tic Multic a st Fo rwa rding screen (
Section 11.2 on page 157) to configure rules to forward
specific multicast frames, such as streaming or control frames, to specific ports.
11.1.2 Wha t You Ne e d To Kno w
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.
Figure 126 on page 156 shows such unknown multicast frames flooded to all ports. With static
multicast forwarding, you can forward these multicasts to ports within a VLAN group.
Figure 127 on page
157 shows frames being forwarded to devices connected to port 3. Figure 128 on page 157 shows
frames being forwarded to ports 2 and 3 within VLAN group 4.
Fig ure 126 No Static Multicast Forwarding
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