H3C S7500 Series Operation Manual page 448

Operation Manual – Multicast
H3C S7500 Series Ethernet Switches
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:
Enter system view
Enable the IGMP snooping feature
globally
Enter VLAN view
Enable the IGMP snooping feature
in VLAN view
Enable the multicast VLAN feature
in VLAN view
Quit VLAN view
Configure the mapping relationship
between multicast VLAN and
multicast sub-VLANs
Caution:
A multicast VLAN cannot be configured as a multicast sub-VLAN.
A multicast sub-VLAN cannot be configured as a multicast VLAN.
A multicast sub-VLAN cannot be configured as the sub-VLAN of another multicast
VLAN.
A multicast sub-VLAN corresponds to only one multicast VLAN.
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.
Every Ethernet switch supports up to 5 multicast VLANs,
To do...
3-11
Chapter 3 IGMP Snooping Configuration
Use the command...
system-view
igmp-snooping enable
vlan vlan-id
igmp-snooping enable
multicast-vlan enable
quit
multicast-vlan vlan-id
subvlan vlan-list
Remarks
—
Required
—
Required
Required
—
Required