Introduction to IP Multicasting - Managing Distribution of Multicast with IGMP - IGMPv2 Timers
5 important questions on Introduction to IP Multicasting - Managing Distribution of Multicast with IGMP - IGMPv2 Timers
What is the usage of and the time value for a Query response interval?
IGMPv1 10 sec;
IGMPv2 can be between 0,1 and 25,5 sec (default 10 sec)
IGMPv3 can be between 0,1 and 53 minutes (default 10 sec)
What is the usage of and the time value for a group membership interval?
IGMPv1 180 sec
A time period during, if a router does not recieve an IGMP report, the router concludes that there are no more members of the group on the subnet
What is the usage of and time value for other Querier Present interval?
A time period during which, if the IGMPv2 nonquerier routers do not recieve an IGMP Querier from the querier router, the nonquerier routers conclude that the querier is dead
Two times Query interval (125 sec) + half default Query Response Interval (10 sec)
IGMPv2 125 * 2 + 10 *1/2 = 255 sec
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What is the usage of and the time value for a Last Member Query Interval?
The maximum response time inserted by IGMPv2 router into the Group-Specific Queries and the time period between two consecutive Group-Specific Queries sent for the same group.
http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipmulti/command/imc-cr-book/imc_i1.html#wp7102223740
What is the usage of and the time value for a Version 1 Router present Timeout?
A time period during, if an IGMPv2 host does not recieve an IGMPv1 Query, the IGMPv2 host concludes that there are no IGMPv1 routers present and starts sending IGMPv2 messages.
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