I've seen this issue reported by a couple of people already and some say upgrading firmware solves it.
The issue is that after a while the route still works, you can ping the web interface but don't even load loading page. Also the Wifi is visible but doesn't give any network access.
Rebooting the router solves the issue for a little while.

It seems like v2 of the C1200 is the only version that did not get a 2017 update, it is still on 2016-11-30.
Any chance to get a firmware update to fix this issue? it's plaguing my network and it is really annoying.


Solution

TP-Admin wrote

Hi All,

Following initial research and investigation, our Engineering Team is confident that they've determined one of the key origins of the issue. From what we have gathered so far, the issue appears to be related to some recent releases of Android OS and Google Apps. This issue stems from these devices' "Cast" feature, which sends MDNS multicast discovery packets in order to keep a live connection with Google products such as Google Home. These packets normally sent in a 20-second interval. However, we have discovered that the devices will sometimes broadcast a large amount of these packets at a very high speed in a short amount of time. This occurs when the device is awakened from the "sleep mode", and could exceed more than 100,000 packets in a short amount of time. The longer your device is in "sleep", the larger this packet burst will be. This issue may eventually cause some of router’s primary features to shut down – including wireless connectivity.