3com S7906E 설치 설명서

 

1-3 

After the configuration, upon receiving an IGMP message on a user port, Switch A tags the message 

with the multicast VLAN ID and relays it to the IGMP querier, so that IGMP Snooping can uniformly 

manage the router ports and member ports in the multicast VLAN. When forwarding multicast data to 

Switch A, Router A needs to send only one copy of multicast traffic to Switch A in the multicast VLAN, 

and Switch A distributes the traffic to all the member ports in the multicast VLAN.  

 

z 

For information about IGMP Snooping, router ports, and member ports, refer to IGMP Snooping 

Configuration in the IP Multicast Volume.  

z 

For information about VLAN tags, refer to VLAN Configuration in the Access Volume.  

 

Complete the following tasks to configure multicast VLAN:  

Configuring Sub-VLAN-Based Multicast VLAN 

Configuring User Port Attributes 

Configuring Multicast VLAN Ports  

Required 

Use either approach. 

Configuring the Maximum Number of Forwarding Entries in a Multicast 
VLAN 

Optional 

 

If you have configured both sub-VLAN-based multicast VLAN and port-based multicast VLAN on a 

device, the port-based multicast VLAN configuration is given preference.  

 

Before configuring sub-VLAN-based multicast VLAN, complete the following tasks: 

z 

Create VLANs as required 

z 

Enable IGMP Snooping in the VLAN to be configured as a multicast VLAN