CHAPTER 14
Configuring Internet Group Management
Protocol
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Understanding IGMP on page 445
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Enabling IGMP on page 447
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Configuring IGMP on page 448
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Disabling IGMP on page 450
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Modifying the IGMP Host-Query Message Interval on page 450
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Modifying the IGMP Query Response Interval on page 451
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Specifying Immediate-Leave Host Removal for IGMP on page 452
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Filtering Unwanted IGMP Reports at the IGMP Interface Level on page 453
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Accepting IGMP Messages from Remote Subnetworks on page 454
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Modifying the IGMP Last-Member Query Interval on page 455
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Modifying the IGMP Robustness Variable on page 456
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Limiting the Maximum IGMP Message Rate on page 457
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Changing the IGMP Version on page 458
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Enabling IGMP Static Group Membership on page 459
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Recording IGMP Join and Leave Events on page 466
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Limiting the Number of IGMP Multicast Group Joins on Logical Interfaces on page 467
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Tracing IGMP Protocol Traffic on page 469
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Disabling IGMP on page 471
Understanding IGMP
The Internet Group Management Protocol (IGMP) manages the membership of hosts
and routing devices in multicast groups. IP hosts use IGMP to report their multicast group
memberships to any immediately neighboring multicast routing devices. Multicast routing
devices use IGMP to learn, for each of their attached physical networks, which groups
have members.
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