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PLANET VC-810S User Manual

Page 62

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User’s Manual of VC-810S / VC-810S48

62

Figure 4-38 Multicast flooding

Figure 4-39 IGMP snooping multicast stream control

IGMP Versions 1 and 2

Multicast groups allow members to join or leave at any time. IGMP provides the method for members and multicast routers

to communicate when joining or leaving a multicast group.

IGMP version 1 is defined in RFC 1112. It has a fixed packet size and no optional data.

The format of an IGMP packet is shown below:

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