Defined by RFC 2236
| + | Bits 0–7 | 8–15 | 16–31 | |||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | Type | Max Resp Time | Checksum | |||||||||||||||||||||||||||||
| 32 | Group Address | |||||||||||||||||||||||||||||||
Where:
- Type is Membership Query (0x11), Membership Report (IGMPv1: 0x12, IGMPv2: 0x16), Leave Group (0x17) IGMPv3 adds type Membership Report (0x22)
- Max Resp Time specifies the time limit for the corresponding report. The field has a resolution of 100 miliseconds, the value is taken directly. This field is meaningful only in Membership Query (0x11); in other messages it is set to 0 and ignored by the receiver.
Read more about this topic: Internet Group Management Protocol
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