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Why does the DHCP client seems to give up after a certain period of time if the Ethernet cable is disconnected when the NDK boots up?

April 26, 2017boots cable certain client DHCP disconnected Ethernet ndk period time

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Why does the DHCP client seems to give up after a certain period of time if the Ethernet cable is disconnected when the NDK boots up?

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If the Ethernet cable is not connected when the board is booted, the DHCP client service attempts to obtain an address for a certain period of time (around two minutes) and then shuts down. Starting with releases 1.8 and newer, NDK incorporates a DHCP reset function in that periodically checks for new servers in case a DHCP is not found right from the start. Basically it creates a task DHCP_reset() in ServiceReport() function that resets the DHCPC service after several minutes if an address is not assigned to the interface.