H3C S7500 Series Ethernet Switches Operation Manual

Operation Manual – Multicast
H3C S7500 Series Ethernet Switches Chapter 3
IGMP Snooping Configuration
3-11
By configuring a multicast VLAN, adding switch ports to the multicast VLAN and
enabling IGMP Snooping, you can make users in different VLANs share the same
multicast VLAN. This saves bandwidth because multicast streams are transmitted only
within the multicast VLAN and also guarantees security because the multicast VLAN is
isolated from user VLANs completely. Therefore, multicast information streams can be
transmitted to users continuously if multicast VLAN is configured.
Perform the following configurations to configure multicast VLAN.
Follow these steps to configure multicast VLAN:
To do... Use the command... Remarks
Enter system view
system-view
—
Enable the IGMP snooping feature
globally
igmp-snooping enable
Required
Enter VLAN view
vlan vlan-id
—
Enable the IGMP snooping feature
in VLAN view
igmp-snooping enable
Required
Enable the multicast VLAN feature
in VLAN view
multicast-vlan enable Required
Quit VLAN view
quit
—
Configure the mapping relationship
between multicast VLAN and
multicast sub-VLANs
multicast-vlan vlan-id
subvlan vlan-list
Required
Caution:
z A multicast VLAN cannot be configured as a multicast sub-VLAN.
z A multicast sub-VLAN cannot be configured as a multicast VLAN.
z A multicast sub-VLAN cannot be configured as the sub-VLAN of another multicast
VLAN.
z A multicast sub-VLAN corresponds to only one multicast VLAN.
z If multicast routing is enabled on a VLAN interface by using the multicast
routing-enable command, the corresponding VLAN cannot be configured as a
multicast VLAN.
z Every Ethernet switch supports up to 5 multicast VLANs,