3com WX3000 User Manual

 

3-1 

In Layer 2 multicast, the system can add multicast forwarding entries dynamically through a Layer 2 

multicast protocol. Alternatively, you can statically bind a port to a multicast MAC address entry by 

configuring a multicast MAC address entry manually.  

Generally, when receiving a multicast packet for a multicast group not yet registered on the device, the 

device will flood the packet within the VLAN to which the port belongs. You can configure a static 

multicast MAC address entry to avoid this. 

Follow these steps to configure a multicast MAC address entry in system view: 

Enter system view 

system-view 

— 

Create a multicast MAC 
address entry 

mac-address multicast 
mac-address interface 
interface-list vlan vlan-id 

Required 

The mac-address argument must 
be a multicast MAC address. 

 

Follow these steps to configure a multicast MAC address entry in Ethernet port view: 

Enter system view 

system-view 

— 

Enter Ethernet port view 

interface interface-type 
interface-number 

— 

Create a multicast MAC 
address entry. 

mac-address multicast 
mac-address vlan vlan-id 

Required 

The mac-address argument must 
be a multicast MAC address. 

 

z 

If the multicast MAC address entry to be created already exists, the system gives you a prompt. 

z 

If you want to add a port to a multicast MAC address entry created through the mac-address 

multicast command, you need to remove the entry first, create this entry again, and then add the 

specified port to the forwarding ports of this entry.  

z 

You cannot enable link aggregation on a port on which you have configured a multicast MAC 

address, and you cannot configure a multicast MAC address on an aggregation port. 

z 

You cannot configure a multicast MAC address starting with 01005e in an 

IGMP-Snooping-enabled VLAN. You can do that if IGMP Snooping is not enabled in the VLAN.