I have a Balance 310. I upgraded to firmware 5.4.9 4 weeks . 2 weeks ago the 310 went into a state that DHCP stopped handing out IP address. If I put static IP address to my laptop, I can get the Balance 310. The log showed nothing except the last restart info. I could not do anything except reboot it. after reboot it worked fine. On the same balance 310 3 weeks ago, it just reboot by itself. the log was no help. I even have the syslog server to catch the log so that the log doesn’t clear along with the reboot. Last week I have another balance 310 at another site, it also rebooted by itself. Does any one know of any issue with firmware 5.4.9 that arbitrary reboot these peplink balance? thanks.