H3C Technologies H3C S3600 Series Switches - Manual (Page 460)

6-11
To do... Use the command... Remarks
Enter system view system-view —
Enter VLAN view vlan vlan-id —
Configure the source IP
address of IGMP general
queries igmp-snooping general-query
source-ip { current-interface |
ip-address }
Optional
0.0.0.0 by default
Configure the source IP
address of IGMP
group-specific queries igmp-snooping special-query
source-ip { current-interface |
ip-address }
0.0.0.0 by default
Suppressing Flooding of Unknown Multicast Traffic in a VLAN
With IGMP Snooping enabled in a VLAN, multicast traffic for unknown multicast groups is flooded within
the VLAN by default. This wastes network bandwidth and affects multicast forwarding efficiency.
With the unknown multicast flooding suppression function enabled, when receiving a multicast packet
for an unknown multicast group, an IGMP Snooping switch creates a nonflooding entry and relays the
packet to router ports only, instead of flooding the packet within the VLAN. If the switch has no router
ports, it drops the multicast packet.
Follow these steps to suppress flooding of unknown multicast traffic in the VLAN:
To do... Use the command... Remarks
Enter system view system-view —
Enable unknown
multicast flooding
suppression
igmp-snooping
nonflooding-enable
Required
By default, unknown multicast flooding
suppression
z If the function of dropping unknown multicast packets or the IRF fabric function is enabled, you
cannot enable unknown multicast flooding suppression.
z Unknown multicast flooding suppression and multicast source port suppression cannot take effect
at the same time. If both are enabled, only multicast source port suppression takes effect. In this
case, multicast data received on the blocked port will be dropped.
Configuring Static Member Port for a Multicast Group
If the host connected to a port is interested in the multicast data for a specific group, you can configure
that port as a static member port for that multicast group.
In Ethernet port view
Follow these steps to configure a static multicast group member port in Ethernet port view:
To do... Use the command... Remarks
Enter system view system-view —