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TheDean
join:2001-10-15
Gilbert, AZ

TheDean

Member

[AZ] Ultimate Tier - 10mbs downloads

After experiencing 100mbps downloads (and loving it) for the past 4 months or so, a few days ago my average has been about 10mbps.

Trouble shooting steps taken:
- rebooted modem\router
- moved to 2nd nic in computer
- tested directly without router
- used different cables
- tried multiple dns servers
- contacted cox support, they advised all signals are at good levels
- Trace to gateway is sub 15ms and no packet loss

Notables:
- Uploads are twice as advertised speeds, sometimes get 40mbps
- Downloads are between 10mbps and 12mbps on average
- This has been consistent for several days

If upload is fast, it doesn't seem logical to me that downloads would be affected by anything on my equipment, I could be wrong though, just seems logical.

Cox support wants to schedule a tech to come to my house, is there any Tier IV network engineering at Cox that can trouble shoot throttling, routing issues or any of the such before I have to wait a week and waste my and the techs time with them coming out here to tell me nothing is wrong with my equipment?

Any assistance would be much appreciated

Details of setup:

Cable Modem - SB6180
Router - Netgear N600
Cox Speed Tier - Ultimate - 150mbps down 20mbps up

Signal levels:
Downstream: Frequency - 849000000Hz, Signal to Ratio 40.4 dB, Power Level -1.2 dBmV
Upstream: Channel ID 3, Frequency - 3610000 hz, Power 39.5

Splitters: None

Speed tests:
Test 1




Test 2 Ookla


No tweaks
Connection - wired
Bypassed router - Yes, same results
No other services with Cox

MarkRH
Premium Member
join:2005-02-08
Edmond, OK
ARRIS BGW210-700
ARRIS TM3402
Asus RT-AC68

MarkRH

Premium Member

Might try the Line Quality Test here: »/pingtest

You will need to enable ICMP in your router and/or Windows Firewall for it to work (it will say if it can't work). It kinda tests how well systems out there are able to communicate with you.. packet loss, etc.

Since you tried a second NIC, I kinda doubt they both got changed to Half-Duplex or something silly.

Anonguy
@cox.net

1 recommendation

Anonguy to TheDean

Anon

to TheDean
You list:

Signal levels:
Downstream: Frequency - 849000000Hz, Signal to Ratio 40.4 dB, Power Level -1.2 dBmV

if you have only 1 downstream that is your problem. You should have 6-8 downstreams, Do you have 2 blue lights on front of the modem?

anon
@cox.net

anon

Anon

In addition to the missing downsteams, you should have 3 up so something definitely isnt right. The quick way to determine if it is an internal or external issue is to bypass the house wiring and boot your modem. Run an extension cord and plug in off the drop at your dmark and see if you get channel bonding.
TheDean
join:2001-10-15
Gilbert, AZ

TheDean to Anonguy

Member

to Anonguy
Thank you for the response, I do have two blue lights on the modem.

Hard Harry7
join:2010-10-19
Narragansett, RI

Hard Harry7 to Anonguy

Member

to Anonguy
At first I thought you hit the nail right on the head, but I think he is copy/pasting the signal data from the part of SB6180 UI that just gives basic signal data, not the whole spectrum. Your showing the "Signal" section and not the "Connect" section. See here fore more info.

»arrisi.force.com/consume ··· dArticle
TheDean
join:2001-10-15
Gilbert, AZ

TheDean

Member

Thank you, you are correct. here is the info from the connect page:

Startup Procedure
Procedure Status Comment
Acquire Downstream Channel 849000000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Configuration File OK 132003_vm2.0_d.cfg
Security Enabled BPI+

-----------------------------------------------
Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1 Locked QAM256 7 849000000 Hz 0.8 dBmV 40.3 dB 0 0
2 Locked QAM256 5 837000000 Hz 0.9 dBmV 40.5 dB 0 0
3 Locked QAM256 6 843000000 Hz 0.3 dBmV 40.3 dB 0 0
4 Locked QAM256 8 855000000 Hz 0.5 dBmV 40.0 dB 0 0
5 Locked QAM256 9 861000000 Hz 0.5 dBmV 40.0 dB 0 0
6 Locked QAM256 10 867000000 Hz 0.6 dBmV 38.7 dB 0 0
7 Locked QAM256 11 873000000 Hz -0.1 dBmV 38.3 dB 0 0
8 Locked QAM256 12 879000000 Hz 0.2 dBmV 38.7 dB 0 0
-------------------------------------------------------------------------------

Correctables Uncorrectables
0 0
-------------------------------------------------------------------------------
Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 3 5120 Ksym/sec 36100000 Hz 39.5 dBmV
2 Locked TDMA and ATDMA 1 2560 Ksym/sec 23300000 Hz 39.5 dBmV
3 Locked ATDMA 2 5120 Ksym/sec 29600000 Hz 39.5 dBmV
4 Not Locked Unknown 2 0 Ksym/sec 0 Hz 0.0 dBmV
-------------------------------------------------------------------------------
Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 3 5120 Ksym/sec 36100000 Hz 39.5 dBmV
2 Locked TDMA and ATDMA 1 2560 Ksym/sec 23300000 Hz 39.5 dBmV
3 Locked ATDMA 2 5120 Ksym/sec 29600000 Hz 39.5 dBmV
4 Not Locked Unknown 2 0 Ksym/sec 0 Hz 0.0 dBmV

Hard Harry7
join:2010-10-19
Narragansett, RI

1 edit

Hard Harry7

Member

said by TheDean:

Configuration File OK 132003_vm2.0_d.cfg

Config looks good. FYI, looks like your set for 3 DHCP IP's.

Do you see the same slow speed on all PC when the router is connected? Trying to rule out software(OS, A/V, etc) issue on desktop.

Signal levels look good, actually perfect. Speedtest looks good, don't see any signs of throttling or latency issues. The main issue I see is the Max route speed is only 32Mbps. Anyone know what would cause that?

:;Edit:: I tried to replicate the issue, and it seems like the servers that show a slow route seem to be the ones that don't give me very accurate results. Basically its picking up a bottleneck of that speed somewhere between you and the test server. Have you tried multiple test sites and servers?
TheDean
join:2001-10-15
Gilbert, AZ

TheDean

Member

And now my speeds are back to 100mbps. I'm assuming Cox found an issue somewhere, and it wasn't at my house.

Hard Harry7
join:2010-10-19
Narragansett, RI

Hard Harry7

Member

Still keep a eye on it and collect data. If it is a problem outside, and went away without any known solution, its possible its a intermittent problem that just happened to get better. And since it's a unusual problem, I suspect a unusual solution.
Rakeesh
join:2011-10-30
Phoenix, AZ

Rakeesh to TheDean

Member

to TheDean
Try a different PC connected directly to the modem?
TheDean
join:2001-10-15
Gilbert, AZ

TheDean

Member

Now I can sleep again at night, haha.