Reference Guide
Related 
Commands
show ip igmp groups — shows the IGMP groups.
ip multicast-routing
Enable IP multicast forwarding.
S4820T
Syntax
ip multicast-routing
To disable multicast forwarding, use the no ip multicast-routing command.
Defaults Disabled.
Command Modes CONFIGURATION
Command History
This guide is platform-specific. For command information about other platforms, refer to the 
relevant 
FTOS Command Line Reference Guide
.
The following is a list of the FTOS version history for this command.
Version 8.3.19.0 Introduced on the S4820T.
Version 8.3.11.1 Introduced on the Z9000.
Version 8.3.7.1 Introduced on the S4810.
E-Series legacy 
command
Usage 
Information
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.
show ip mroute
View the multicast routing table.
S4820T
Syntax
show ip mroute [static | group-address [source-address] | count 
| snooping [vlan vlan-id] [group-address [source-address]] | 
summary | vlt [group-address [source-address] | count]
Parameters
static (OPTIONAL) Enter the keyword static to view static multicast 
routes.
group-address 
[
source-address
]
(OPTIONAL) Enter the multicast group-address to view only routes 
associated with that group.
Enter the source-address to view routes with that group-address and 
source-address.
914










