Busybox 1.23.2 still seems to be suffering from the issue discussed on http://lists.busybox.net/pipermail/busybox/2010-August/073028.html and claimed to have been fixed by https://git.busybox.net/busybox/commit/?id=e74d79866c6d125527e3ba69245a087a28fd19ce. I see the changes introduced by this commit in the source code but still, if syslog is started with the remote server address being a url, before the network is up and running, it never will attempt sending any data out. I waited longer than set 2 minutes period, even 10-15 minutes on each try, and verified the no transmission by running tcpdump on the hardware platform. However, if busybox is restarted with the exact same parameters once the networking is running, I can see the udp traffic and verify the contents.