Commands In This Chapter - Dell PowerEdge M420 Reference Manual

IGMPv2 introduced a Leave Group message, which is sent by a host when it
leaves a multicast group for which it was the last host to send an IGMP
Report message. Receipt of this message causes the Querier possibly to
reduce the remaining lifetime of its state for the group, and to send a group-
specific IGMP Query message to the multicast group.The Leave Group
message is not used with IGMPv3, since the source address filtering
mechanism provides the same functionality.
IGMPv3 also allows hosts to specify the list of hosts from which they want to
receive traffic. Traffic from other hosts is blocked inside the network. It also
allows hosts to block packets for all sources sending unwanted traffic.
IGMPv3 adds the capability for a multicast router to learn which sources are
of interest to neighboring systems for packets sent to any particular multicast
address. This information gathered by IGMP is provided to the multicast
routing protocol (that is, DVMRP, PIM-DM, and PIM-SM) that is currently
active on the router in order to ensure multicast packets are delivered to all
networks where there are interested receivers.

Commands in this Chapter

This chapter explains the following commands:
ip igmp
ip igmp last-member-query-count
ip igmp last-member-query-interval
ip igmp query-interval
ip igmp query-max-response-time
ip igmp robustness
ip igmp startup-query-count
ip igmp startup-query-interval
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IGMP Commands
ip igmp version
show ip igmp
show ip igmp groups
show ip igmp interface
show ip igmp membership
show ip igmp interface stats
ip igmp router-alert-optional