C
HAPTER
17
| IGMP Commands
– 421 –
igmp mode This command displays or sets the IGMP snooping mode for the switch.
SYNTAX
igmp mode [enable | disable]
enable - Enables IGMP snooping globally for the switch. When
IGMP snooping is enabled, the switch will monitor network traffic to
determine which hosts want to receive multicast traffic.
disable - Disables IGMP snooping globally for the switch.
DEFAULT SETTING
Enabled
COMMAND USAGE
This switch can passively snoop on IGMP Query and Report packets
transferred between IP multicast routers/switches and IP multicast host
groups to identify the IP multicast group members. It simply monitors the
IGMP packets passing through it, picks out the group registration
information, and configures the multicast filters accordingly.
EXAMPLE
IGMP>mode enable
IGMP>
igmp leave proxy This command displays or sets IGMP leave proxy for the switch.
SYNTAX
igmp leave proxy [enable | disable]
enable - Enables IGMP leave proxy. If enabled, the switch
suppresses leave messages unless received from the last member
port in the group.
disable - Disables IGMP leave proxy.
DEFAULT SETTING
Disabled
COMMAND USAGE
◆ IGMP leave proxy suppresses all unnecessary IGMP leave messages so
that a non-querier switch forwards an IGMP leave packet only when the
last dynamic member port leaves a multicast group.
◆ The leave-proxy feature does not function when a switch is set as the
querier. When the switch is a non-querier, the receiving port is not the
last dynamic member port in the group, the receiving port is not a
router port, and no IGMPv1 member port exists in the group, the switch
will generate and send a group-specific (GS) query to the member port
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