Suppressing Flooding Of Unknown Multicast Traffic In A Vlan - H3C S5600 Series Operation Manual

Operation Manual – Multicast
H3C S5600 Series Ethernet Switches
To do...
Enable IGMP
Snooping
Enable IGMP
Snooping querier
Configure the interval
between IGMP
general queries
Configure the source
IP address of IGMP
general queries

6.2.8 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...
Enter system view
Enable unknown
multicast flooding
suppression
Use the command...
igmp-snooping enable
igmp-snooping querier
igmp-snooping
query-interval seconds
igmp-snooping
general-query source-ip
{ current-interface |
ip-address }
Use the command...
system-view
igmp-snooping
nonflooding-enable
6-12
Chapter 6 IGMP Snooping Configuration
Remarks
Required
By default, IGMP Snooping
is disabled.
Required
By default, IGMP Snooping
querier is disabled.
Optional
By default, the interval
between IGMP general
queries is 60 seconds.
Optional
By default, the source IP
address of IGMP general
queries is 0.0.0.0.
Remarks
—
Required
By default, unknown multicast
flooding suppression