What is the main difference between IGMPv2 and IGMPv3?
- IGMPv3’s max response time is 10 seconds by default.
- IGMPv3 sends periodic IGMP membership queries.
- IGMPv3 introduced a new IGMP membership report with source filtering support.
- IGMPv3 can only work with SSM, while IGMPv2 can only work with PIM-SM/DM.
Explanation: IGMPv3 supports all IGMPv2’s IGMP message types and is backward compatible with it. The differences between the two are that IGMPv3 added new fields to the IGMP membership query and introduced a new IGMP message type called a Version 3 membership report to support source filtering.
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