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CONFIDENTIAL
26-Jan-04
© 2002 Procket Networks, Inc. All rights reserved.
IGMP Protocol Flow - Querier
•Hosts respond to query to indicate (new or continued) interest in group(s)
•only 1 host should respond per group
•Hosts fall into idle-member state when same-group report heard.
•After 260 sec with no response, router times out group
224.0.0.1
Still
interested?
(general query)
224.0.0.1
125 sec
I want 230.0.0.1
230.0.0.1
230.0.0.1
0-10 sec
230.0.0.1 group
Yes, me!