john9527
Part of the Furniture
I have an ASUS RT-AC87U router. When using firmware 380.60 Beta 2 or 380.61 Alpha 2 the router seems to "ping" my desktop computer (Win 10) about every 3 to 5 seconds.
I do know that if I turn off Enable UPnP Media Server the problem goes away.
Those are SSDP broadcasts...and my first thought is that this would be expected if the media server is active (it's broadcasting it's existence on the network and looking for clients). 3-5 secs between broadcasts does seem to be a bit higher frequency than I would expect, but I don't think it's anything to really be concerned about. It's possible ASUS may have made a change in this area to address the problem where some DLNA clients couldn't reliably detect the media server...I can't tell from your post if this is new behavior for you or you just noticed it on the later levels.