C
HAPTER
17
| IGMP Commands
– 423 –
igmp querier This command displays or sets the IGMP querier mode for the specified
VLAN.
SYNTAX
igmp querier [vlan-id] [enable | disable]
vlan-id - VLAN identifier. (Range: 1-4095)
enable - Enables the switch to serve as querier on this VLAN. When
enabled, the switch can serve as the querier if selected in the
bidding process with other competing multicast switches/routers,
and if selected will be responsible for asking hosts if they want to
receive multicast traffic.
disable - Disables the switch from serving as querier on this VLAN.
DEFAULT SETTING
Disabled
COMMAND USAGE
A router, or multicast-enabled switch, can periodically ask their hosts if
they want to receive multicast traffic. If there is more than one router/
switch on the LAN performing IP multicasting, one of these devices is
elected “querier” and assumes the role of querying the LAN for group
members. It then propagates the service requests on to any upstream
multicast switch/router to ensure that it will continue to receive the
multicast service. This feature is not supported for IGMPv3 snooping.
EXAMPLE
IGMP>querier 1 enable
IGMP>
igmp fastleave This command displays or sets IGMP fast leave for specified ports.
SYNTAX
igmp fastleave [port-list] [enable | disable]
port-list - A specific port or range of ports. (Range: 1-28, or all)
enable - Enables IGMP fast leave. If enabled, the switch
immediately deletes a member port of a multicast service if a leave
packet is received at that port.
disable - Disables IGMP fast leave.
DEFAULT SETTING
Disabled
COMMAND USAGE
◆ The switch can be configured to immediately delete a member port of a
multicast service if a leave packet is received at that port and the Fast
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