Addendum

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Internet Group Management Protocol
(IGMP)
The IGMP commands are supported by the Dell Networking operating software (FTOS) on the Z9000
S4810 S4820T platform.
This chapter contains the following sections:
• IGMP Commands
• IGMP Snooping Commands
IGMP Commands
FTOS supports IGMPv1/v2/v3 and is compliant with RFC-3376.
Important Points to Remember
• FTOS supports protocol-independent multicast-sparse (PIM-SM) and protocol-independent source-
specific multicast (PIM-SSM) include and exclude modes.
• IGMPv2 is the default version of IGMP on interfaces. You can configure IGMPv3 on interfaces. It is
backward compatible with IGMPv2.
• On the S-Series, the maximum number of interfaces supported 31. On the S-Series, the maximum
number of interfaces supported 31. The Z9000 supports up to 95 interfaces.
• 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.
ip igmp group-join-limit
To limit the number of IGMP groups that can be joined in a second, use this feature.
Z9000 S4810 S4820TS6000
Syntax
ip igmp group-join-limit number
Parameters
number Enter the number of IGMP groups permitted to join in a
second. The range is from 1 to 10000.
Defaults none
Command
Modes
CONFIGURATION (conf-if-interface-slot/port)
Internet Group Management Protocol (IGMP)
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