User's Manual

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Note:
If quick-query is enabled, send query to the new port when there is up of the port. The function is applicable to
the downstream host of not actively sending join packets.
42.1.14 Configuring Decrease-query-report-for-mvc of IGMP Snooping
If decrease-query-report of IGMP-snooping is enabled, the command works after enabling mvc. The command
is used to decrease igmp-snooping forwarding or protocol packets of the broadcast in mvc mode.
Configure the following in the global configuration mode:
Command Purpose
[no] ip igmp-snooping decrease-query-report-
for-mvc
Configures decrease-query-report-for-mvc of
IGMP-snooping. Decrease the number of
protocol packet in the mode of mvc after the
command is enabled.
By default, igmp-snooping and mvc will collaboratively send igmp protocol packets, which will increase the
number of packets.
Note: If the function is enabled, it is not applicable to the condition of igmp-snooping and mvc working
collaboratively.
42.1.15 Configuring no-send-special-query of IGMP-snooping
If no-send-special-query of IGMP-snooping is enabled and querier is disabled, special query will not be
forwarded after receiving leave packets.
Configure the following in global configuration mode:
Command Purpose
[
no
]
ip igmp-snooping no-send-
special-query
Configure no-send-special-query of IGMP-snooping
By default, special-query packets will be forwarded only leave packets are received.
Note:
If Querier is enabled, the command will not take effect.
42.1.16 Configuring Forward-L3-to-Mrouter of IGMP Snooping to Forward
the Data Packets to the Routing Port
If L3 multicast feature is initiated and igmp-snooping does not join messages to downstream port, only
downstream vlan port can be learnt by multicast route. If forward-l3-to-mrouter function is intiated, all the
downstream router ports can be learned. Data messages could be sent to multicast router pot registered by
PIM-SM message not broadcasting messages to all downstream physical port. The command is mainly used
under the following conditions.