Hello! I have a DIR-890L router that worked great out of the box from purchase in Aug 2015 until mid-December 2016. That is when both the primary wifi & guest wifi started cutting out sporadically. This happened with a Google TV, iPhones (4, 5S, 6S), & Amazon Fire tablet. In an attempt to correct the problem I upgraded the firmware from out of the box 1.06 to 1.10 using IE 11, but this did not correct the problem. I'm a bit scared to try the 1.11 beta, but I did grab the bin file from Dropbox.
Any advice please? More detail below. Thank you for the consideration.
What Hardware version is your router? A1
What Firmware version is currently loaded? 1.10
What region are you located? USA - FL
Are you wired or wireless connected to the router? Brighthouse Cable aka Spectrum line into Arris TG862G/TW-0 cable modem. Cat5 cable (Cat6 ordered after reading some posts on here) @20 feet to DIR-890L. One desktop connected via Cat5 cable @10 feet to DIR-890L, also suffering sporadic slow connection speeds but I'm more concerned with the wifi.
Has a Factory Reset been performed? I thought so (paperclipped the button) but all Wifi & QoS settings were retained - is that normal?
Was a Factory Reset performed before and after any firmware updates then set up from scratch? After the 1.10 firmware upgrade failed to resolve the wifi dropping.
What ISP Service do you have? Brighthouse aka Spectrum Cable Modem
What ISP Modem Mfr. and model # do you have? Arris TG862G/TW-0. I had Spectrum reset the box remotely - did not resolve problem.
Is ISP Modem/Service using Dynamic or Static WAN IP addressing? Dynamic
What ISP Modem service link speeds UP and Down do you have? The ookla beta site says 27 ms ping, 72.62 mbps download, 6.07 mbps upload on the wired PC. When the PC is having one of its poor performance spells I've seen this drop down to single digit download & barely detectable upload speeds.
Check cable between Modem and Router, swap out to be sure. All connections are secure. Cat6 cables ordered from Amazon, will be here Monday.
Check ISP MTU requirements, Cable is usually 1500, DSL is around 1492 down to 1472. Call the ISP and ask. ping yahoo.com -f -l 1472 returned a reply; 1474 returned a fragmented packet. I did not find an MTU setting in the mgmt console.
For DSL/PPPoE connections on the router, ensure that "Always ON" option is enabled. I'm sorry, I'm not sure where to look for this.
If the ISP modem has a built in router, it's best to bridge the modem. The Arris is bridged, which gives the cable people fits.