Over the last week I've been having a pretty annoying problem with latency on my home network.  Generally it'll run fine, but *roughly* every twenty minutes, the latency will go up from my normal 20-30ms to about 175-200ms.  It will stay in this range for a few minute before dropping back to normal.  This is incredibly annoying, and makes things like playing online games impossible. While troubleshooting, I tried running ping from two different devices, and found that they both seemed to experience the issue, but not simultaneously.  It may be possible for it to happen to both a once, but due to the inconsistent nature of the problem, I haven't been able to test it.

Out network consists of a bunch of desktop PCs, some being connected to a switch, a tp-link TL-SG1005D, and some connected to our router directly, a tp-link Archer c7.  All but one are connected with CAT6, with the last being CAT5e.  The of two devices I mentioned before that I tested with, one is connected through the switch, and one is not.  The router is connected to a separate modem provided by our ISP.  It is a combined router/modem, but I have residential gateway features disabled as the wifi wasn't good enough.