SNR S2940-8G-v2 Switch Configuration Guide
Multicast VLAN
Chapter 42
Multicast VLAN
42.1 Introductions to Multicast VLAN
Based on current multicast order method, when orders from users in different VLAN, each VLAN
will copy a multicast traffic in this VLAN, which is a great waste of the bandwidth. By configuration
of the multicast VLAN, we add the switch port to the multicast VLAN, with the IGMP Snooping/MLD
Snooping functions enabled, users from different VLAN will share the same multicast VLAN. The
multicast traffic only exists within a multicast VLAN, so the bandwidth is saved. As the multicast
VLAN is absolutely separated from the user VLAN, security and bandwidth concerns can be met
at the same time, after the multicast VLAN is configured, the multicast traffic will be continuously
sent to the users.
42.2 Multicast VLAN Configuration Task List
1. Enable the multicast VLAN function
2. Configure the IGMP Snooping
1. Enable the multicast VLAN function
Command Explanation
VLAN configuration mode
multicast-vlan
no multicast-vlan
Configure a VLAN and enable the multicast
VLAN on it. The 'no multicast-vlan' command dis-
ables the multicast function on the VLAN.
multicast-vlan association <vlan-list>
no multicast-vlan association <vlan-list>
Associate a multicast VLAN with several VLANs.
The no form of this command deletes the related
VLANs associated with the multicast VLAN.
multicast-vlan association interface (ether-
net | port-channel | ) IFNAME
no multicast-vlan association interface (eth-
ernet | port-channel | ) IFNAME
Associate the specified port with the multicast
VLAN, so the associated ports are able to receive
the multicast flow. The no command cancels the
association between the ports and the multicast
VLAN.
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