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The number of IGMP host groups required by the application depends on how many host groups are expected to be joined at a given time. Since each configured multicast address requires its own IGMP host group, it is recommended to configure at least one host group per multicast address used by the application, plus one additional host group. Thus for a single multicast address, it is recommended to setset NET_IGMP_CFG_MAX_NBR_HOST_GRP with an initial value of 2.
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µC/TCP-IP supports BSD 4.x sockets and basic socket API for the TCP/UDP/IP protocols.
See Configuring window sizes for more information about how to configure receive and transmit queues buffer size.
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