U

Visitor

 • 

3 Messages

Sun, Jun 6, 2021 4:43 PM

Getting a third of the bandwidth

Friday I replaced my Arris 6190 with a new 8200 and had Comcast up me from 800 Mbps to 1200 Mbps.  I used to get around 600 with the 800 package.  I figured upgrading the modem would get me more bandwidth.  Plugging the PC directly into the modem shows 301 Mbps down on Xfinity's speed test.   They were "working on the network" Friday and Saturday but those tickets are closed and my Internet is still a third of what it should be.  (I under stand the most I'd get would be in the 900s but still.)  I've rebooted everything ten times.  No change.

I eliminated all the splitters when I moved in.  There are a couple of unions, but again my old signal was stable.

Below is what the Arris says.  Look normal?

Procedure Status Comment
Acquire Downstream Channel 507000000 Hz Locked
Connectivity State OK Operational
Boot State OK Operational
Configuration File OK
Security Enabled BPI+
DOCSIS Network Access Enabled Allowed

Downstream Bonded Channels
Channel ID Lock Status Modulation Frequency Power SNR/MER Corrected Uncorrectables
9 Locked QAM256 507000000 Hz 0.5 dBmV 41.0 dB 0 0
6 Locked QAM256 489000000 Hz 0.2 dBmV 40.9 dB 0 0
7 Locked QAM256 495000000 Hz 0.0 dBmV 40.7 dB 0 0
8 Locked QAM256 501000000 Hz 0.1 dBmV 40.9 dB 0 0
10 Locked QAM256 513000000 Hz 0.7 dBmV 41.2 dB 0 0
11 Locked QAM256 519000000 Hz 0.4 dBmV 40.9 dB 0 0
12 Locked QAM256 525000000 Hz 0.0 dBmV 40.9 dB 0 0
13 Locked QAM256 531000000 Hz -0.1 dBmV 40.8 dB 0 0
14 Locked QAM256 537000000 Hz 0.3 dBmV 41.0 dB 0 0
15 Locked QAM256 543000000 Hz 0.7 dBmV 41.1 dB 0 0
16 Locked QAM256 549000000 Hz 0.7 dBmV 41.0 dB 0 0
17 Locked QAM256 555000000 Hz 0.2 dBmV 40.7 dB 0 0
18 Locked QAM256 561000000 Hz 0.7 dBmV 40.8 dB 0 0
19 Locked QAM256 567000000 Hz 0.8 dBmV 40.9 dB 0 0
20 Locked QAM256 573000000 Hz 0.5 dBmV 40.7 dB 0 0
21 Locked QAM256 579000000 Hz 0.6 dBmV 40.7 dB 0 0
22 Locked QAM256 585000000 Hz 0.3 dBmV 40.5 dB 0 0
23 Locked QAM256 591000000 Hz 0.1 dBmV 40.5 dB 0 0
24 Locked QAM256 597000000 Hz 0.6 dBmV 40.6 dB 0 0
25 Locked QAM256 603000000 Hz 0.0 dBmV 40.4 dB 0 0
26 Locked QAM256 609000000 Hz -0.4 dBmV 40.3 dB 0 0
27 Locked QAM256 615000000 Hz -0.1 dBmV 40.5 dB 0 0
28 Locked QAM256 621000000 Hz -0.2 dBmV 40.5 dB 0 0
29 Locked QAM256 627000000 Hz -0.3 dBmV 40.2 dB 0 0
30 Locked QAM256 633000000 Hz -0.4 dBmV 40.2 dB 0 0
31 Locked QAM256 639000000 Hz -0.3 dBmV 40.2 dB 0 0
32 Locked QAM256 645000000 Hz -0.3 dBmV 40.3 dB 0 0
33 Locked QAM256 651000000 Hz -0.8 dBmV 39.9 dB 0 0
34 Locked QAM256 657000000 Hz -1.0 dBmV 40.0 dB 0 0
35 Locked QAM256 663000000 Hz -0.7 dBmV 39.9 dB 0 0
36 Locked QAM256 669000000 Hz -0.9 dBmV 40.0 dB 0 0
37 Locked Other 690000000 Hz -0.2 dBmV 38.2 dB 37913965 0

Upstream Bonded Channels
Channel Channel ID Lock Status US Channel Type Frequency Width Power
1 1 Locked SC-QAM 35600000 Hz 6400000 Hz 36.0 dBmV
2 2 Locked SC-QAM 29200000 Hz 6400000 Hz 36.0 dBmV
3 3 Locked SC-QAM 22800000 Hz 6400000 Hz 36.0 dBmV
4 4 Locked SC-QAM 16400000 Hz 6400000 Hz 35.0 dBmV
5 5 Locked SC-QAM 39600000 Hz 1600000 Hz 36.0 dBmV

Current System Time: Sun Jun 6 11:08:15 2021

Responses

EG

Expert

 • 

88K Messages

2 m ago

The signal stats are fine. You won't be able to get 1200 Mbps with that modem as Comcast rates it for only up to a gig: https://www.xfinity.com/support/devices#details It has only gigabit ethernet ports, so with overhead, it can only deliver around 940 to 950.

And as a matter of fact, since it is not compatible with their gig speed tier, it will default to using an even slower configuration file so will get even slower speeds than before.

You need a modem with a 2.5 gig ethernet port or you would need to use an LAG / LACP configuration.

(edited)

Visitor

 • 

3 Messages

2 m ago

I still don't understand why I'm not getting the 900 Mbps.  The tech that helped me Friday told me I would only get nine something throughput.

 My bad on not researching that beforehand.  I thought DOCSIS 3.1 was enough.  I'll return it tomorrow and get the Motorola MB8611 with the 2.5 gig port.  It costs $30 less than the Arris anyway (3 month faster return on investment.)   

"defaults to a slower tier"....ummmmnn...its almost like they want to frustrate you enough to just take their $10+ a month equipment up-charge....After I install the Motorola I may just turn it back down and save another $10 a month....

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