ZyXEL Communications GS1920-48HPv2, Руководство пользователя

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Chapter 11 Static Multicast Forwarding
GS1920v2 Series User’s Guide
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Sta tic Multic a st Fo rwa rding
11.1 Sta tic Multic a st Fo rwa rd Se tup 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 Yo u C a n Do
Use the
Sta tic Multic a st Fo rwa rding
screen ( Section 11.2 on page 130 ) to configure rules to forward
specific multicast frames, such as streaming or control frames, to specific port(s).
11.1.2 Wha t Yo u 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 100 on page 129 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 101 on
page 130 shows frames being forwarded to devices connected to port 3. Figure 102 on page 130 shows
frames being forwarded to ports 2 and 3 within VLAN group 4.
Fig ure 100
No Static Multicast Forwarding