1-11
Use the undo igmp-snooping nonflooding-enable command to disable the IGMP Snooping
non-flooding function.
By default, the IGMP Snooping non-flooding function is disabled, namely unknown multicast packets
are flooded in the VLAN.
The difference between the IGMP Snooping non-flooding function and the function of dropping
unknown multicast packets is in that the former passes unknown multicast packets to the router ports
while the latter directly discards unknown multicast packets.
You can configure this command only after IGMP Snooping is enabled globally. When IGMP Snooping
is disabled globally, the configuration of the igmp-snooping nonflooding-enable command is also
removed.
z IGMP Snooping must be enabled before you enable the function of unknown multicast flooding
suppression.
z If the function of dropping unknown multicast packets is enabled, you cannot enable the IGMP
Snooping non-flooding function.
z The IGMP Snooping non-flooding function and the multicast source port suppression function
cannot take effect at the same time. If both are configured, only the multicast source port
suppression function takes effect.
Related commands: unknown-multicast drop enable, multicast-source-deny, display
multicast-source-deny
Examples
# Enable IGMP Snooping non-flooding after you enable IGMP Snooping globally and disable both port
stacking and unknown-multicast dropping.
<Sysname> system-view
System View: return to User View with Ctrl+Z.
[Sysname] igmp-snooping enable
[Sysname] igmp-snooping nonflooding-enable
igmp-snooping querier
Syntax
igmp-snooping querier
undo igmp-snooping querier
View
VLAN view
Parameters
None
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