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15–6 MULTILINK ML2400 ETHERNET COMMUNICATIONS SWITCH – INSTRUCTION MANUAL
IGMP CHAPTER 15: IGMP
15.2 Configuring IGMP through the Command Line Interface
15.2.1 Commands
The igmp command enters IGMP configuration mode and enables or disables IGMP on the
switch.
igmp
igmp <enable/disable>
The
show igmp command displays the IGMP status.
show igmp
The following command sequence illustrates how to enable and query the status of IGMP.
ML2400# igmp
ML2400(igmp)##
igmp enable
IGMP is enabled
ML2400(igmp)## show igmp
IGMP State : Enabled
ImmediateLeave : Disabled
Querier : Enabled
Querier Interval : 125
Querier Response Interval : 10
Multicasting Unknown Streams : Enable
ML2400(igmp)## igmp disable
IGMP is disabled
ML2400(igmp)## show igmp
IGMP State : Disabled
ImmediateLeave : Disabled
Querier : Enabled
Querier Interval : 125
Querier Response Interval : 10
Multicasting Unknown Streams : Enable
ML2400(igmp)##
The output of the show igmp command provides the following useful information:
• IGMP State shows if IGMP is turned on (Enable) or off (Disable).
• Immediate Leave provides a mechanism for a particular host that wants to leave
a multicast group. It disables the port (where the leave message is received) ability
to transmit multicast traffic.
• Querier shows where the switch is a querier or a non-querier. In our example, the
switch is the querier.
• Querier Interval shows the time period in seconds on which the switch sends
general host-query messages.
• Querier Response Interval specifies maximum amount of time in seconds that
can elapse between when the querier sends a host-query message and when it
receives a response from a host.
• Multicasting Unknown Streams shows if the control of multicast streams is on
(Enabled) or off (Disabled).
The
show-group command displays the multicast groups.