What is IGMP v2?

IGMP version 2 is the “enhanced” version of IGMP version 1. One of the major reasons for a new version was to improve the “leave” mechanism. In IGMP version 1, hosts just stop listening to the multicast group address but they never report this to the router.

Which is better IGMP v2 or v3?

IGMPv2 improves over IGMPv1 by adding the ability for a host to signal desire to leave a multicast group and IGMPv3 improves over IGMPv2 mainly by adding the ability to listen to multicast originating from a set of source IP addresses only.

What is the size of IGMP version 2?

32 bits
IGMP Version 2 uses a message format 32 bits in size, with three fields. The first 8 bits are the type, the next 8 bits are the max response time, and the final 16 bits are a checksum. This message is encapsulated inside of an IP packet with a protocol number of 2.

What is IGMP version?

IGMP (Internet Group Management Protocol) version 1 is the first version that hosts can use to announce to a router that they want to receive multicast traffic from a specific group. It’s a simple protocol that uses only two messages: Membership report.

What is the size of maximum response time in IGMP version 2?

0.1, which includes all devices on the subnet. Referring to the packet capture in Example 2-1, you see the IGMP type is 0x11, the maximum response time is 0x64 (hex for 10 seconds, the default for IGMPv2), the checksum, and the group address of 0.0.

What is IGMP v2 and v3?

IGMP version 3 adds support for “source filtering”. IGMP version 1 and version 2 allow hosts to join multicast groups but they don’t check the source of the traffic. Any source is able to receive traffic to the multicast group(s) that they joined.

What port does IGMP use?

IGMP reports are forwarded to the uplink port (the router ports). Multicast data traffic is forwarded to uplink ports (the router ports). The operation of multicast IGMP snooping depends on the correct configuration of the upstream switch.

What is IGMP in modem?

Internet Group Management Protocol (IGMP) snooping allows the switch to forward multicast traffic intelligently. Based on the IGMP query and report messages, the switch forwards traffic only to the ports that request the multicast traffic rather than to all ports.

What is IGMP v3?

Version 3 of IGMP adds support for “source filtering”, that is, the ability for a system to report interest in receiving packets *only* from specific source addresses, or from *all but* specific source addresses, sent to a particular multicast address.