3com WX3000 User Manual

 

2-5 

Optional 

Configuring Multicast VLAN 

Optional 

 

Follow these steps to enable IGMP Snooping: 

Enter system view  

— 

Enable IGMP Snooping 
globally 

Required 

By default, IGMP Snooping is 
disabled globally. 

Enter VLAN view 

vlan vlan-id 

— 

Enable IGMP Snooping on the 
VLAN 

Required 

By default, IGMP Snooping is 
disabled on all the VLANs. 

 

z 

Before enabling IGMP Snooping in a VLAN, be sure to enable IGMP Snooping globally in system 

view; otherwise the IGMP Snooping settings will not take effect. 

z 

If IGMP Snooping and VLAN VPN are enabled on a VLAN at the same time, IGMP queries are 

likely to fail to pass the VLAN. You can solve this problem by configuring VLAN tags for queries. 

For details, see 

.  

 

With the development of multicast technologies, IGMPv3 has found increasingly wide application. In 

IGMPv3, a host can not only join a specific multicast group but also explicitly specify to receive or reject 

the information from a specific multicast source. Working with PIM-SSM, IGMPv3 enables hosts to join 

specific multicast sources and groups directly, greatly simplifying multicast routing protocols and 

optimizing the network topology.  

Follow these steps to configure the version of IGMP Snooping: 

Enter system view 

system-view 

— 

Enter VLAN view 

vlan vlan-id 

— 

Configure the version of IGMP 
Snooping 

igmp-snooping version 
version-number 

Optional 

The default IGMP Snooping 
version is version 2.