This issue may be similar to the one described here. The only difference is that I have a PL1200 instead of a PLP1200.
So, I've been having this issue for a few months where the PL1200 start dropping packets after some time. After 5 minutes of trying to connect through them the connection to the internet is re-established, but a faster solution is to unplug one of the PL devices and plug it back into the outlet. For reference, my home network looks like this:
Internet <-> PL1200 <-> PL1200 <-> Router <-> Everything else
I can vouch for the router, since I've had it for a year and used it in a different home connecting it directly to the external Internet line, and it never dropped the signal. As far as I can tell, my Internet is also not the one that is faulty on the ISP's side, since I don't have an issue with the connection when I bypass the PL devices. As a result I'm 95% sure the issue is due to something between, and/or including the PL devices. I don't believe the electrical wiring of my home is the problem, since there seems to be a pattern to the disconnecting. The PL devices tend to disconnect after a period of low network activity. I've only had them drop the connection once or twice while I was playing games online. I've seen some people comment that this may be a problem due to the power saving feature of the PL1200 devices... but currently there is no way to disable this feature. I found this in the PLP1200 FAQ:
Disabling the standby mode: is that possible maybe via software?
Yes, that’s possible; however, we did not support this in current genie (2.3.1.61). We are working on adding the PL1200 product to have this functionality in genie by the end of 2015.
