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New Contributor
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Slow "Real World" upload speeds despite good speedtest.net results
I am a Cox Ultimate subscriber in San Diego, CA, and for months (if not years) I have been struggling with slow upload speeds. When testing with speedtest.net and Cox's own speed test, I am receiving 250Mbps+ download speeds and 30+ upload readings. "Real World" download speed is as advertised, but my upload speed is nowhere near what it should be. Here's what I have tested with uploading so far (all via hard wired gigabit computer):
- Uploaded a 4K video to Youtube
- Uploaded same video file to Vimeo
- Uploaded file via Synology Diskstation to my office (San Diego Cox Optical Internet 200Mbps)
- Uploaded file to my parents (Comcast San Francisco Bay Area)
In all of these 4 examples, not once did I exceed 800KBps (3.6Mbps) upload speed, as monitored both through my browser and my ASUS 802.11ac router. I can understand not ever reaching your theoretical maximum, but this was 1/10th of the speeds that I should be receiving.
Here is what I have already done to try to fix my issue:
- Had a Cox technician come out to my house to verify all signal levels. He detected a potential issue, so he ran a brand new heavy duty line from the street into my garage, he replaced all splitters/cables, and he ran a brand new line from my garage to the cable modem. He tested all signal levels and they all tested perfect.
- I bought a brand new top of the line Arris SB6190 cable modem.
- Tried brand new Netgear Nighthawk X6 router
- Flashed my router (ASUS RT-AC68U) to factory settings. Replaced all cables with brand new CAT5e cables.
- Connected the cable modem directly to the cable run from the street into my garage without any splitters. Plugged in a laptop via gigabit ethernet and ran upload test.
I know that I am not crazy or unrealistic about the speeds that I should be receiving. My coworker also has Cox Ultimate (in El Cajon), and we transferred a file from his house to our office and the speed did not drop below 3MBps (24mbps). 30 seconds later I tried a file transfer from my house and it did not exceed 600KBps.
Every time I call Cox support, they run some tests and then their solution is to send a tech to my house. The tech comes to my house and they tell me that everything looks normal and it "should" be working. I appreciate any help that this forum might bring.
noah82
New Contributor
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Here's a shot from my modem status page:
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noah82
New Contributor
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Also just ran a 25MB upload only test on testmy.net. Result was 3.4mbps.
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ChrisL
Former Moderator
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Can you try to run a constant ping to 192.168.100.1 and share your results?
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Tecknowhelp
Valued Contributor II
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Can you upload faster to those services through other means? Can you post some tracert to those servers?
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noah82
New Contributor
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Ping has started…
PING 192.168.100.1 (192.168.100.1): 56 data bytes
64 bytes from 192.168.100.1: icmp_seq=0 ttl=63 time=9.235 ms
64 bytes from 192.168.100.1: icmp_seq=1 ttl=63 time=2.595 ms
64 bytes from 192.168.100.1: icmp_seq=2 ttl=63 time=9.887 ms
64 bytes from 192.168.100.1: icmp_seq=3 ttl=63 time=6.313 ms
64 bytes from 192.168.100.1: icmp_seq=4 ttl=63 time=5.551 ms
64 bytes from 192.168.100.1: icmp_seq=5 ttl=63 time=4.243 ms
64 bytes from 192.168.100.1: icmp_seq=6 ttl=63 time=9.791 ms
64 bytes from 192.168.100.1: icmp_seq=7 ttl=63 time=4.667 ms
64 bytes from 192.168.100.1: icmp_seq=8 ttl=63 time=3.694 ms
64 bytes from 192.168.100.1: icmp_seq=9 ttl=63 time=1.752 ms
64 bytes from 192.168.100.1: icmp_seq=10 ttl=63 time=5.174 ms
64 bytes from 192.168.100.1: icmp_seq=11 ttl=63 time=10.947 ms
64 bytes from 192.168.100.1: icmp_seq=12 ttl=63 time=10.676 ms
64 bytes from 192.168.100.1: icmp_seq=13 ttl=63 time=5.491 ms
64 bytes from 192.168.100.1: icmp_seq=14 ttl=63 time=4.708 ms
64 bytes from 192.168.100.1: icmp_seq=15 ttl=63 time=9.651 ms
64 bytes from 192.168.100.1: icmp_seq=16 ttl=63 time=7.184 ms
64 bytes from 192.168.100.1: icmp_seq=17 ttl=63 time=5.836 ms
64 bytes from 192.168.100.1: icmp_seq=18 ttl=63 time=2.727 ms
64 bytes from 192.168.100.1: icmp_seq=19 ttl=63 time=11.177 ms
64 bytes from 192.168.100.1: icmp_seq=20 ttl=63 time=10.321 ms
64 bytes from 192.168.100.1: icmp_seq=21 ttl=63 time=7.861 ms
64 bytes from 192.168.100.1: icmp_seq=22 ttl=63 time=6.321 ms
64 bytes from 192.168.100.1: icmp_seq=23 ttl=63 time=9.290 ms
64 bytes from 192.168.100.1: icmp_seq=24 ttl=63 time=23.578 ms
64 bytes from 192.168.100.1: icmp_seq=25 ttl=63 time=1.582 ms
64 bytes from 192.168.100.1: icmp_seq=26 ttl=63 time=7.792 ms
64 bytes from 192.168.100.1: icmp_seq=27 ttl=63 time=5.926 ms
64 bytes from 192.168.100.1: icmp_seq=28 ttl=63 time=47.659 ms
64 bytes from 192.168.100.1: icmp_seq=29 ttl=63 time=1.459 ms
64 bytes from 192.168.100.1: icmp_seq=30 ttl=63 time=1.543 ms
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noah82
New Contributor
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I can upload much faster at my work Cox Metro E, but I 'm out for the next 2 days. I'll update when I get back to the office.
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Tecknowhelp
Valued Contributor II
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Looks like you have some latency on your network. Should be no more then 1-2ms from PC to modem. Try "ping -n 50 192.168.1.1". If the latency is the same, the problem is PC > Router, if the latency is less, the problem is Router > Modem.
BTW, do you have a VPN set up on your home network for work? Or any special configuration of the router that might be causing latency?
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noah82
New Contributor
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Looks like the ping to my router is under 1ms, so the latency could be from the router to the modem. What can I do to fix this?
My question also is that I bypassed the router completely and tried a transfer from a laptop hard wired to the modem and still had slow speeds, so this might not be the issue.
Ping has started…
PING 192.168.1.1 (192.168.1.1): 56 data bytes
64 bytes from 192.168.1.1: icmp_seq=0 ttl=64 time=0.287 ms
64 bytes from 192.168.1.1: icmp_seq=1 ttl=64 time=0.371 ms
64 bytes from 192.168.1.1: icmp_seq=2 ttl=64 time=0.412 ms
64 bytes from 192.168.1.1: icmp_seq=3 ttl=64 time=0.406 ms
64 bytes from 192.168.1.1: icmp_seq=4 ttl=64 time=0.451 ms
64 bytes from 192.168.1.1: icmp_seq=5 ttl=64 time=0.382 ms
64 bytes from 192.168.1.1: icmp_seq=6 ttl=64 time=0.455 ms
64 bytes from 192.168.1.1: icmp_seq=7 ttl=64 time=0.238 ms
64 bytes from 192.168.1.1: icmp_seq=8 ttl=64 time=0.465 ms
64 bytes from 192.168.1.1: icmp_seq=9 ttl=64 time=0.390 ms
64 bytes from 192.168.1.1: icmp_seq=10 ttl=64 time=0.407 ms
64 bytes from 192.168.1.1: icmp_seq=11 ttl=64 time=0.379 ms
64 bytes from 192.168.1.1: icmp_seq=12 ttl=64 time=0.368 ms
64 bytes from 192.168.1.1: icmp_seq=13 ttl=64 time=0.446 ms
64 bytes from 192.168.1.1: icmp_seq=14 ttl=64 time=0.429 ms
64 bytes from 192.168.1.1: icmp_seq=15 ttl=64 time=0.390 ms
64 bytes from 192.168.1.1: icmp_seq=16 ttl=64 time=0.395 ms
64 bytes from 192.168.1.1: icmp_seq=17 ttl=64 time=0.472 ms
64 bytes from 192.168.1.1: icmp_seq=18 ttl=64 time=0.256 ms
64 bytes from 192.168.1.1: icmp_seq=19 ttl=64 time=0.417 ms
64 bytes from 192.168.1.1: icmp_seq=20 ttl=64 time=0.336 ms
64 bytes from 192.168.1.1: icmp_seq=21 ttl=64 time=0.421 ms
64 bytes from 192.168.1.1: icmp_seq=22 ttl=64 time=0.358 ms
64 bytes from 192.168.1.1: icmp_seq=23 ttl=64 time=0.341 ms
64 bytes from 192.168.1.1: icmp_seq=24 ttl=64 time=0.400 ms
64 bytes from 192.168.1.1: icmp_seq=25 ttl=64 time=0.413 ms
64 bytes from 192.168.1.1: icmp_seq=26 ttl=64 time=0.350 ms
64 bytes from 192.168.1.1: icmp_seq=27 ttl=64 time=0.384 ms
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noah82
New Contributor
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No VPN configuration on the router. I have a software VPN on my laptop, but not my desktop. VPN client is disconnected on the laptop.
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ChrisL
Former Moderator
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I know the Arris engineers have a ticket open to investigate intermittent high local latency to certain modems. I suspect that may be what it is you're seeing.
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Tecknowhelp
Valued Contributor II
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Are you saying you think the high latency from router to modem is a false negative or relevant to OP's problem? Do you see latency when you ping his modem?
With the router bypassed, was the latency still high to 192.168.100.1?
Some of it will depend on how you answer the above. First, I would replace the ethernet between modem and router. Might as well get CAT6 to future proof yourself since you have the SB6190.
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ChrisL
Former Moderator
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The problem seems to be isolated to the link between 192.168.100.1 and the connected device. Beyond that Arris would be the ones to have more info.
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Tecknowhelp
Valued Contributor II
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My question is what is the symptom of said problem? Is it just delaying the ICMP packet or is the known issue actual packet loss (TCP/UDP) to modem? Another words should we try to isolate to fix OP's performance issue? Or does it have no impact on root cause?
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ChrisL
Former Moderator
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It could be performance impacting however I'm not involved with what's going on Arris's end of the discussion.
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noah82
New Contributor
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I need to perform the test again with connecting the cable modem directly to a computer while pinging 192.168.100.1...I did it during my initial test before posting. I can go out and purchase a CAT6 cable as well, but I have tried multiple good quality CAT5e cables, which should give me full speed.
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