H3C Technologies H3C S10500 Series Switches - Manual (Page 81)

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NOTE:
•
You cannot configure multicast VLAN on a device with IP multicast routing enabled.
• The VLAN to be configured as a multicast VLAN must exist.
• The VLANs to be configured as sub-VLANs of the multicast VLAN must exist and must not be sub-VLANs
of any other multicast VLAN.
• The total number of sub-VLANs of a multicast VLAN must not exceed the maximum number the system
can support.
Configuring port-based multicast VLAN
When configuring port-based multicast VLAN, you must configure the attributes of each user port and
then assign the ports to the multicast VLAN.
NOTE:
•
A user port can be configured as a multicast VLAN port only if it is an Ethernet port, or Layer 2
aggregate interface.
• In Ethernet interface view or Layer 2 aggregate interface view, configurations that you make are effective
on only the current port. In port group view, configurations that you make are effective on all ports in the
current port group.
Configuration prerequisites
Before you configure port-based multicast VLAN, complete the following tasks:
• Create VLANs as required
• Enable IGMP snooping in the VLAN to be configured as a multicast VLAN
• Enable IGMP snooping in all the user VLANs
Configuring user port attributes
Configure the user ports as hybrid ports that permit packets of the specified user VLAN to pass, and
configure the user VLAN to which the user ports belong as the default VLAN.
Configure the user ports to permit packets of the multicast VLAN to pass and untag the packets. Thus,
after receiving multicast packets tagged with the multicast VLAN ID from the upstream device, the Layer
2 device untags the multicast packets and forwards them to its downstream device.
Follow these steps to configure user port attributes:
To do... Use the command... Remarks
Enter system view system-view —
interface interface-type
interface-number
Enter interface view or port group
view
port-group { manual
port-group-name | aggregation
agg-id }
Required
Use either command