US Cable Support > Comcast HSI > [Speed] Apartment Complex Slow at Nights?

reply to nerdburg

Re: [Speed] Apartment Complex Slow at Nights?

btw it looks like it is a D3 area
ie you have 2 downstream channels

Perhaps one or two more channels need to be added.

reply to itisme17604
I'd be interested to see some traceroutes to some sites (both during the day when speeds are good and to the same sites at night when your speeds are slow). Maybe 2-3 sites and see if there is a noticeable difference from day to night.

reply to DarkLogix
I had thought that D3 areas have upgraded from 8/2 to 12/2 or 16/2 am I correct? That is what happened with my parents place in the Bay Area where they have 4-8 channel downstream.

reply to itisme17604
NIGHT TEST 10:50pm

ShaperProbe
Connected to server 217.163.1.100.

Estimating capacity:
Upstream: 5830 Kbps.
Downstream: 4363 Kbps.

The measurement will last for about 2.5 minutes. Please wait.

Checking for traffic shapers:

Upstream: Burst size: 4450-4587 KB; Shaping rate: 2090 Kbps.

Downstream: Measurement aborted due to high packet loss rate.

Another test resulted:

Connected to server 38.102.0.111.

Estimating capacity:
Upstream: 6951 Kbps.
Downstream: 5007 Kbps.

The measurement will last for about 2.5 minutes. Please wait.

Checking for traffic shapers:

Upstream: Burst size: 4795-4974 KB; Shaping rate: 2128 Kbps.

Downstream: Burst size: 1401-1484 KB; Shaping rate: 2725 Kbps.

Signal Levels
Downstream Bonding Channel Value
Channel ID 1 2
Frequency 585000000 Hz 579000000 Hz
Signal to Noise Ratio 38 dB 37 dB
Downstream Modulation QAM256 QAM256
Power Level
The Downstream Power Level reading is a snapshot taken at the time this page was requested. Please Reload/Refresh this Page for a new reading
0 dBmV 0 dBmV

Upstream Bonding Channel Value
Channel ID 3
Frequency 21600000 Hz
Ranging Service ID 6571
Symbol Rate 2.560 Msym/sec
Power Level 43 dBmV
Upstream Modulation [3] QPSK
[2] 16QAM

Ranging Status Success

Signal Stats (Codewords) Bonding Channel Value
Channel ID 1 2
Total Unerrored Codewords 23884706961 6704836888
Total Correctable Codewords 45 84
Total Uncorrectable Codewords 763 1486

Notes
For the speed tier 8/2, this is kind of unacceptable when the internet slows down this much at night. I can easily get a 20mpbs Powerboost during the day, but at night, on Speedtest.net, I can only get 3-4 mpbs if I'm lucky. One of the ShaperProbe tests said that the packetloss was too high? What does this mean?

Your signal levels are good and consistent. That does indeed look like a capacity issue to me. The only other possibility to my mind would be some upstream noise problems, but then I wouldn't expect to see such a dramatic and consistent drop in download speeds.

reply to nerdburg
Is there anyway Comcast can fix this capacity issue? Anything I can do on my end?

There's nothing you can do besides get a tech out to verify if it's a noise problem or not. If it's capacity related there are multiple things they can do to address the issue depending on the current setup. Capacity can be relieved by adding more QAMs (which is unlikely), a node or transmitter split which is more likely the solution.

I wasn't asking you...