Service Manual
21
Internet Group Management Protocol (IGMP)
The IGMP commands are supported by the Dell Networking operating software on the Dell Networking OS.
This chapter contains the following sections:
• IGMP Commands
• IGMP Snooping Commands
IGMP Commands
Dell Networking OS supports IGMPv1/v2/v3 and is compliant with RFC-3376.
Important Points to Remember
• Dell Networking OS supports protocol-independent multicast-sparse (PIM-SM) and protocol-independent source-specic
multicast (PIM-SSM) include and exclude modes.
• IGMPv2 is the default version of IGMP on interfaces. You can congure IGMPv3 on interfaces. It is backward compatible with
IGMPv2.
• The maximum number of interfaces supported 95.
• There is no hard limit on the maximum number of groups supported.
• IGMPv3 router interoperability with IGMPv2 and IGMPv1 routers on the same subnet is not supported.
• An administrative command (ip igmp version) is added to manually set the IGMP version.
• All commands previously used for IGMPv2 are compatible with IGMPv3.
clear ip igmp groups
Clear entries from the group cache table.
Syntax
clear ip igmp [vrf vrf-name] groups [group-address | interface]
Parameters
vrf vrf-name (OPTIONAL) Enter the keyword vrf followed by the name of the VRF to
congure this setting on that VRF.
NOTE: Applies to specic VRF if input is provided, else applies to default
VRF.
group-address (OPTIONAL) Enter the IP multicast group address in dotted decimal format.
interface interface Enter the following keywords and slot/port or number information:
• For a 1-Gigabit Ethernet interface, enter the keyword GigabitEthernet
then the slot/port information.
• For a 10-Gigabit Ethernet interface, enter the keyword
TenGigabitEthernet then the slot/port information.
Internet Group Management Protocol (IGMP)
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