3Com Switch 8800 Advanced Software V5 Configuration Guide

Configuring IGMP 527
■ A group-and-source-specific query carries a group address and one or more
source addresses.
2 Reports containing multiple group records
Unlike an IGMPv1 or IGMPv2 report message, an IGMPv3 report message is
destined to 224.0.0.22 and contains one or more group records. Each group
record contains a multicast group address and an uncertain number of source
addresses.
Group record types include:
■ Current-state record: Current-state record: The current-state record reports the
current reception state of the interface on which the report is sent. The state
can be either Include (the interface has a filter mode of Include for the specified
multicast address list) or Exclude (the interface has a filter mode of Exclude for
the specified multicast address list).
■ Filter-mode-change record: A filter-mode-change record indicates that the
interface filter mode has changed from Include to Exclude or from Include to
Exclude for the specified multicast address list.
■ Source-list-change record: A source-list-change record indicates that new
source addresses are allowed or old source addresses are blocked.
Protocols and Standards The following documents describe different IGMP versions:
■ RFC 1112: Host Extensions for IP Multicasting
■ RFC 2236: Internet Group Management Protocol Version 2
■ RFC 3376: Internet Group Management Protocol Version 3
Configuring IGMP Complete these tasks to configure IGMP:
n
■ Configurations performed in IGMP view are effective on all interfaces, while
configurations performed in interface view are effective on the current
interface only.
Task Description
“IGMP Configuration” on page
523
“Enabling IGMP” on page
528
Required
“Configuring IGMP Versions”
on page 528
Optional
“Configuring a Static
Member of a Multicast
Group” on page 529
Optional
“Configuring a Multicast
Group Filter” on page 529
Optional
“Configuring IGMP
Performance Parameters” on
page 530
“Configuring IGMP Message
Options” on page 530
Optional
“Configuring IGMP Timers”
on page 531
Optional
“Configuring IGMP Fast
Leave” on page 533
Optional