Command Manual (For Soliton) – Multicast
H3C S3100 Series Ethernet Switches
Chapter 1 IGMP Snooping Configuration
Commands
1-22
1.1.22 service-type multicast
Syntax
service-type multicast
undo service-type multicast
View
VLAN view
Parameters
None
Description
Use the
service-type multicast
command to configure the current VLAN as a
multicast VLAN.
Use the
undo service-type multicast
command to remove the current VLAN as a
multicast VLAN.
By default, no VLAN is a multicast VLAN.
In an IGMP Snooping environment, by configuring a multicast VLAN and adding ports
to the multicast VLAN, you can allow users in different VLANs to share the same
multicast VLAN. This saves bandwidth because multicast streams are transmitted only
within the multicast VLAN. In addition, because the multicast VLAN is isolated from
user VLANs, this method also enhances the information security.
Note:
z
One port belongs to only one multicast VLAN.
z
The port connected to a user terminal must be a hybrid port.
z
The multicast member port must be in the same multicast VLAN with the router port.
Otherwise, the port cannot receive multicast packets.
z
If a router port is in a multicast VLAN, the router port must be configured as a trunk
port or a hybrid port that allows tagged packets to pass for the multicast VLAN.
Otherwise, all the multicast member ports in this multicast VLAN cannot receive
multicast packets.
z
If a multicast member port needs to receive multicast packets forwarded by a 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.