H3C S3600 Series Command Manual page 18

Command Manual – Multicast
H3C S3600 Series Ethernet Switches-Release 1510
Parameter
None
Description
Use the service-type multicast command to set the current VLAN as a multicast
VLAN.
Use the undo service-type multicast command to cancel the multicast VLAN setting.
By default, no VLAN is a multicast VLAN.
By configuring a multicast VLAN, adding the corresponding switch ports to the multicast
VLAN, and enabling IGMP Snooping, you can allow users in different VLANs to share
the same multicast VLAN. This saves bandwidth since multicast stream is transmitted
only within the multicast VLAN, and also guarantees the security because the multicast
VLAN is completely isolated from the user VLANs.
Note:
Isolate VLANs cannot be set as multicast VLANs.
One port belongs to one multicast VLAN only.
The type of ports connected to the user terminal must be hybrid.
The multicast member port must be in the same multicast VLAN with the router port.
Otherwise, the port cannot receive multicast packets.
If a router port is added to a multicast VLAN, the router port must be configured as a
trunk port or tagged hybrid port. Otherwise, all the multicast member ports in this
multicast VLAN cannot receive multicast packets.
If a multicast member port needs to receive packets forwarded by the router port
that does not belong to any multicast VLAN, the multicast member port must be
removed from the multicast VLAN. Otherwise, the port cannot receive multicast
packets.
Example
# Configure VLAN 2 as a multicast VLAN.
<H3C> system-view
System View: return to User View with Ctrl+Z.
[H3C] vlan 2
[H3C-vlan2] service-type multicast
Chapter 1 IGMP Snooping Configuration
1-15
Commands