Reference Guide

Internet Group Management Protocol (IGMP) | 545

Internet Group Management Protocol (IGMP)

Overview

The platforms on which a command is supported is indicated by the character — e for the E-Series,

c for the C-Series, and s for the S-Series — that appears below each command heading.

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 PIM-SM and PIM-SSM include and exclude modes.

• IGMPv2 is the default version of IGMP on interfaces. IGMPv3 can be configured on interfaces,

and is backward compatible with IGMPv2.

• The maximum number of interfaces supported is 512 on the E-Series. On the C-Series and

S-Series 31 interfaces are supported.

• Maximum number of groups supported – no hard limit

• 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.

The commands include:

• clear ip igmp groups

• debug ip igmp

• ip igmp access-group

• ip igmp group-join-limit

• ip igmp immediate-leave

• ip igmp last-member-query-interval

• ip igmp querier-timeout

• ip igmp query-interval

• ip igmp query-max-resp-time