TO_IN—The filtering mode has changed from Exclude to Include.
TO_EX—The filtering mode has changed from Include to Exclude.
ALLOW—The Source Address fields in this group record contain a list of the additional sources
from which the system wants to obtain data for packets sent to the specified multicast address.
If the change was to an Include source list, these sources are the addresses that were added to
the list. If the change was to an Exclude source list, these sources are the addresses that were
deleted from the list.
BLOCK—The Source Address fields in this group record contain a list of the sources from which
the system no longer wants to obtain data for packets sent to the specified multicast address. If
the change was to an Include source list, these sources are the addresses that were deleted from
the list. If the change was to an Exclude source list, these sources are the addresses that were
added to the list.
Protocols and standards
•
RFC 1 1 12, Host Extensions for IP Multicasting
RFC 2236, Internet Group Management Protocol, Version 2
•
RFC 3376, Internet Group Management Protocol, Version 3
•
IGMP configuration task list
Task at a glance
Configuring basic IGMP functions
•
(Required.)
•
(Optional.)
•
(Optional.)
•
(Optional.)
Adjusting IGMP performance
(Optional.)
Configuring basic IGMP functions
Before you configure basic IGMP functions, complete the following tasks:
Configure any unicast routing protocol so that all devices are interoperable at the network layer.
•
•
Configure PIM.
Determine the IGMP version.
•
Determine the multicast group and multicast source addresses for static group member
•
configuration.
Determine the ACL for multicast group filtering.
•
Enabling IGMP
Specifying the IGMP version
Configuring an interface as a static member interface
Configuring a multicast group filter
Enabling IGMP fast-leave processing
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