AC1450 WNDR3700 WNDR4300 AP Mode Performance (Latency) Issue

Question

Cable Modem&nbsp; &gt;&gt; AC1450 Router &gt;&gt; WNDR3700v4 AP&nbsp;I also have another WNDR4300SW AP (also connected to the AC1450), no issues noted, so problem seems to be the WNDR3700v4 while in AP mode.&nbsp;Symptoms noted on both wired and wireless networks. Focus is on wired since that is the easiest to troubleshoot.&nbsp;All devices using current available firmware.&nbsp;The WNDR3700v4 AP will (after 24-48 hours) degrade. If I run a command from anywhere in the network I can isolate the problem to the WNDR3700v4 wireless and wired.&nbsp; The symptom is best described by PING results:&nbsp;PING 192.168.1.2 -t -l 999Reply from 192.168.1.2: bytes=999 time&lt;1ms TTL=64Reply from 192.168.1.2: bytes=999 time&lt;1234ms TTL=64Reply from 192.168.1.2: bytes=999 time&lt;1ms TTL=64Reply from 192.168.1.2: bytes=999 time&lt;1567ms TTL=64Alternating short and long ICMP latency times on the PINGs. I do not have a wireshark or other detailed analysis at this time. I assume I'd see similar strange behavior for TCP traffic; the end-user experience is very jittery voice and longer page load times.&nbsp;The release notes for firmware for the WNDR3700v4 has no specifics on what was changed, so I do not have any idea if there are known issues. I'm trying a back-leveled firmware to see if the behavior improves.&nbsp;Any ideas?&nbsp;&nbsp;&nbsp;

geogherkins1 · Answer

Continuing to monitor whether an older firmware on WNDR3700v4 has a net positive impact.

Interesting idea on power supply.

If firmware doesn't fix it during the next 48 hours, I'll swap the AC-DC adapter between the WNDR4300SW and WNDR3700V4 and see if the symptom follows the power.

LOL The reason I've got old routers is they work, they are cheap, and no need to dump them in a landfill just because they are not shiny and new. My Windows 10 running on a Dell 530 desktop is over 14 years old still humming along great. ;/

plemans · Answer

Well the WNDR3700 was released in 2009. the version 4 in 2015.&nbsp;
If reinstalling the firmware and doing a factory reset doesn't help, the only other thing I'd investigate would be the power supply.&nbsp;
I wouldn't buy one but if you had a matching (same exact voltage and polarity and AT LEAST the same amperage but it can be more) power supply, you could see if yours was going bad.&nbsp;
If that doesn't help, it might be time to check into upgrading to something from this generations wifi and not wireless N.&nbsp;

plemans · Answer

I hate throwing things in the garbage as well but going from a wireless N router to an decent AC or AX router would be a pretty solid wireless performance increase. N didn't have a whole lot of throughput. But if your speeds your ISP provides aren't that great.....older still works well.&nbsp;

geogherkins1 · Answer

And now the mystery deepens. I have not had to swap power supplies, because the mystery symptom has moved to the other AP on its own accord.&nbsp;&nbsp;As I implied, I have two APs connecting via wired 1GbE to a single router:&nbsp;&nbsp;|cable modem24.183.35.241&nbsp;|&nbsp;|AC1450 (Router)&nbsp; _ _ _ _ _ _ _ _ _ _ _ _ _192.168.1.1&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; |&nbsp;|&nbsp; &nbsp; &nbsp; |&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; |&nbsp;|&nbsp; &nbsp; &nbsp; PC1&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; |&nbsp;|&nbsp; &nbsp; &nbsp; 192.168.1.20&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;|&nbsp;|&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;|WNDR3700v4 (AP)&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; |192.168.1.2&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; |&nbsp;|&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;|&nbsp;|&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;|PC2&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;WNDR4300SW (AP)192.168.1.21&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 192.168.1.3&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;|&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;|&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; PC3&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 192.168.1.22&nbsp;Depending on the font, that diagram will look ok or ugly. In Courier New (fixed font) it is beautiful!&nbsp;When I opened this thread PC2 was suffering from too much jitter over wired and wireless.I am focused entirely on wired network for troubleshooting.&nbsp;Reply from 192.168.1.3: bytes=998 time=1277ms TTL=64Reply from 192.168.1.3: bytes=998 time&lt;1ms TTL=64Reply from 192.168.1.3: bytes=998 time=1291ms TTL=64Reply from 192.168.1.3: bytes=998 time&lt;1ms TTL=64Reply from 192.168.1.3: bytes=998 time=1291ms TTL=64Those results would be resolved by a power reset of the AP. Thinking it a firmware problem, I down-graded the firmware one release and waited over 48 hours. So far, no return of the symptom.&nbsp; But!&nbsp; Now the other WNDR4300SW AP, which up to now, so far as I know has not had this symptom, has shown the same jitter and every-other PING echo delay as did the first.&nbsp; PC3 now suffers the jitter problem.&nbsp;So it would seem not to be a firmware problem with WNDR3700v4.&nbsp;&nbsp;&nbsp;Of course, the common element here is router AC1400.&nbsp;The change that exposed this issue was the introduction of the 2nd AP, WNDR4300SW to the network. (Previous to having a 2nd AP there was no jitter on WNDR3700v4).&nbsp;&nbsp;Any more ideas?&nbsp;

plemans · Answer

did you check the primary router? What firmware is on it?&nbsp;

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AC1450 WNDR3700 WNDR4300 AP Mode Performance (Latency) Issue

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