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Strange DHCP behaviour on high InterfaceInitialise timeout

Posted by miclam on June 22, 2017


during testing with my three Interfaces (Ethernet, Powerline, Bridge) I found a strange behaviour of the DHCP which I found hard to figure out.

What happend, was that I did not connect a Cable to my Eth Interface, thus the PHY Autonegotiation failed. But it's timeout was set to 5s, whereas the IP stack sends NetworkDown Events every 3 seconds (for all interfaces). So multiple DHCP requests where send and the Transaction ID always missmatched.

Maybe it's noteworthy that the NetworkInterfaceInitialise methods should finish in <1s, especially with multiple interfaces.

Regards, Michael

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