Reference Guide

556 | Internet Group Management Protocol (IGMP)
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ip igmp snooping flood
c e s z
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
ip igmp snooping last-member-query-interval
c e s z
The last member query interval is the “maximum response time” inserted into Group-Specific queries
sent in response to Group-Leave messages. This interval is also the interval between successive
Group-Specific Query messages. Use this command to change the last member query interval.
Syntax
ip igmp snooping last-member-query-interval milliseconds
To return to the default value, enter no ip igmp snooping last-member-query-interval.
Parameters
Defaults
1000 milliseconds
Command Modes
INTERFACE VLAN
Command
History
Version 8.3.11.1 Introduced on the Z9000.
Version 8.2.1.0 Introduced on the C-Series and S-Series.
Version 7.7.1.1 Introduced on E-Series.
milliseconds
Enter the interval in milliseconds.
Default: 1000 milliseconds
Range: 100 to 65535
Version 8.3.11.1 Introduced on the Z9000.
Version 7.6.1.0 Introduced on S-Series
Version 7.5.1.0 Introduced on C-Series
E-Series legacy command