Internet Group Management Protocol (IGMP) | 557
ip igmp snooping fast-leave
c e s
Enable IGMP snooping fast leave for this VLAN.
Syntax
ip igmp snooping fast-leave
To disable IGMP snooping fast leave, use the no igmp snooping fast-leave command.
Defaults
Not configured
Command Modes
INTERFACE VLAN—(conf-if-vl-n)
Command
History
Usage
Information
Queriers normally send a certain number of queries when a leave message is received prior to deleting
a group from the membership database. There may be situations in which fast deletion of a group is
required. When IGMP fast leave processing is enabled, the switch will remove an interface from the
multicast group as soon as it detects an IGMP version 2 leave message on the interface.
ip igmp snooping flood
c e s
This command controls the flooding behavior of unregistered multicast data packets. On the E-Series,
when flooding is enabled (the default), unregistered multicast data traffic is flooded to all ports in a
VLAN. When flooding is disabled, unregistered multicast data traffic is forwarded to only multicast
router ports, both static and dynamic, in a VLAN. If there is no multicast router port in a VLAN, then
unregistered multicast data traffic is dropped. On the
C-Series and S-Series, unregistered multicast data traffic is dropped when flooding is disabled; they do
not forward the packets to multicast router ports. On the C-Series and S-Series, Layer 3 multicast must
be disabled (no ip multicast-routing) in order to disable Layer 2 multicast flooding.
Syntax
ip igmp snooping flood
Defaults
Enabled
Command Modes
CONFIGURATION
Command
History
Version 7.6.1.0 Introduced on S-Series
Version 7.5.1.0 Introduced on C-Series
E-Series legacy command
Version 8.2.1.0 Introduced on the C-Series and S-Series.
Version 7.7.1.1 Introduced on E-Series.
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