Related 
Commands
show ip igmp groups – shows the IGMP groups.
ip multicast-routing
Enable IP multicast forwarding.
C-Series, E-Series, S-Series, Z-Series, S4810
Syntax
ip multicast-routing
To disable multicast forwarding, use the no ip multicast-routing command.
Defaults Disabled.
Command Modes CONFIGURATION
Command History
Version 8.3.7.0 Introduced on the S4810.
E-Series legacy 
command
Usage 
Information
You must enter this command to enable multicast on the E-Series.
After you enable multicast, you can enable IGMP and PIM on an interface. In INTERFACE 
mode, enter the ip pim sparse-mode command to enable IGMP and PIM on the 
interface.
Related 
Commands
ip pim sparse-mode – enables IGMP and PIM on an interface.
mac-flood-list
Provide an exception to the restrict-flood configuration so that multicast frames within a specified MAC address range 
to be flooded on all ports in a VLAN.
E-Series
Syntax
mac-flood-list mac-address mask vlan vlan-list [min-speed 
speed]
Parameters
mac-address
Enter a multicast MAC address in hexadecimal format.
mac-mask
Enter the MAC Address mask.
vlan 
vlan-list
Enter the VLAN(s) in which flooding is restricted. Separate values by 
commas — no spaces (1,2,3) or indicate a list of values separated by 
a hyphen (1-3). The range is 1 to 4094.
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