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Throttled speeds on wired connection. Netgear AC1900 c7000v2 firmware 1.03.01

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Throttled speeds on wired connection. Netgear AC1900 c7000v2 firmware 1.03.01

I've had nothing but issues with my xfinity internet service. Unfortunately, they are my only option in my area so I'm hoping someone can help me. After my third modem/router from Xfinity went out, I bought a Netgear AC1900 c7000v2 modem/router combo but my speeds seem to be throttled at no higher than 35mbps and what makes it really weird is my upload speed is fairly consistent at 23-24mbps, faster than the download at times.

I have tried troubleshooting everything in home; from connecting directly to the coax from the wall, to factory resetting the gateway, to disconnecting devices and uninstalling programs I thought could be eating bandwidth. Anything I could think of to try before I finally relented and called tech support.

First I spoke on the phone with an agent who had me unplug the modem for 12seconds, then had me wait for 1 minute before testing my connection, which was still at a consistent 30-35 mpbs. She then told me she couldn't help and to call netgear. While trying to find a number online to call Netgear with, my modem went out and when it came back up I was getting speeds of 300-330mpbs down and 23 up. So I didn't contact netgear but my gateway kept turning off and on throughout the day. I was getting proper speeds when it was up but the interruptions were sometimes 2-3x an hour, so I unplugged it and plugged it back in. And it broke.

Then I spoke with an agent in chat who mentioned there being an issue with my Down time and Up time ratios, I think? He said he sent all the proper signals to sync my gateway with my service but it never reached above 35mpbs in the past 18hrs since he sent those signals and the internet is still dropping sporadically, though not as often as every hour.

 

Here are the event logs from my modem/router, hopefully someone can help

 

 

Event Log

      

Time Priority Description
2020-8-8, 12:10:09Warning (5)MDD message timeout;CM-MAC=44:a5:6e:36:7f:f0;CMTS-MAC=0c:11:67:02:9e:b1;CM-QOS=1.1;CM-VER=3.0;
2020-8-8, 12:08:30Warning (5)Unicast DSID PSN startup error
1970-1-1, 00:00:49Notice (6)Honoring MDD; IP provisioning mode = IPv6
1970-1-1, 00:00:41Notice (6)WiFi Interface [wl1] set to Channel 40 (Side-Band Channel:N/A) - Reason:INIT
1970-1-1, 00:00:41Notice (6)WiFi Interface [wl0] set to Channel 9 (Side-Band Channel:N/A) - Reason:INIT
1970-1-1, 00:00:39Critical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=44:a5:6e:36:7f:f0;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
2020-8-8, 12:03:29Critical (3)16 consecutive T3 timeouts while trying to range on upstream channel 2;CM-MAC=44:a5:6e:36:7f:f0;CMTS-MAC=0c:11:67:02:9e:b1;CM-QOS=1.1;CM-VER=3.0;
2020-8-8, 12:03:29Critical (3)Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=44:a5:6e:36:7f:f0;CMTS-MAC=0c:11:67:02:9e:b1;CM-QOS=1.1;CM-VER=3.0;
2020-8-8, 12:03:29Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=44:a5:6e:36:7f:f0;CMTS-MAC=0c:11:67:02:9e:b1;CM-QOS=1.1;CM-VER=3.0;
2020-8-8, 12:03:10Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=44:a5:6e:36:7f:f0;CMTS-MAC=0c:11:67:02:9e:b1;CM-QOS=1.1;CM-VER=3.0;
2020-8-8, 12:02:50Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=44:a5:6e:36:7f:f0;CMTS-MAC=0c:11:67:02:9e:b1;CM-QOS=1.1;CM-VER=3.0;
2020-8-8, 12:02:30Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=44:a5:6e:36:7f:f0;CMTS-MAC=0c:11:67:02:9e:b1;CM-QOS=1.1;CM-VER=3.0;
2020-8-8, 12:02:10Critical (3)16 consecutive T3 timeouts while trying to range on upstream channel 0;CM-MAC=44:a5:6e:36:7f:f0;CMTS-MAC=0c:11:67:02:9e:b1;CM-QOS=1.1;CM-VER=3.0;
2020-8-8, 12:02:10Critical (3)Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=44:a5:6e:36:7f:f0;CMTS-MAC=0c:11:67:02:9e:b1;CM-QOS=1.1;CM-VER=3.0;
2020-8-8, 12:02:10Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=44:a5:6e:36:7f:f0;CMTS-MAC=0c:11:67:02:9e:b1;CM-QOS=1.1;CM-VER=3.0;
2020-8-8, 12:01:50Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=44:a5:6e:36:7f:f0;CMTS-MAC=0c:11:67:02:9e:b1;CM-QOS=1.1;CM-VER=3.0;
2020-8-8, 12:01:30Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=44:a5:6e:36:7f:f0;CMTS-MAC=0c:11:67:02:9e:b1;CM-QOS=1.1;CM-VER=3.0;
2020-8-8, 12:01:25Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=44:a5:6e:36:7f:f0;CMTS-MAC=0c:11:67:02:9e:b1;CM-QOS=1.1;CM-VER=3.0;
2020-8-8, 12:01:24Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=44:a5:6e:36:7f:f0;CMTS-MAC=0c:11:67:02:9e:b1;CM-QOS=1.1;CM-VER=3.0;
2020-8-8, 12:01:23Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=44:a5:6e:36:7f:f0;CMTS-MAC=0c:11:67:02:9e:b1;CM-QOS=1.1;CM-VER=3.0;
2020-8-8, 12:01:22Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=44:a5:6e:36:7f:f0;CMTS-MAC=0c:11:67:02:9e:b1;CM-QOS=1.1;CM-VER=3.0;
2020-8-8, 12:01:21Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=44:a5:6e:36:7f:f0;CMTS-MAC=0c:11:67:02:9e:b1;CM-QOS=1.1;CM-VER=3.0;
2020-8-8, 12:01:20Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=44:a5:6e:36:7f:f0;CMTS-MAC=0c:11:67:02:9e:b1;CM-QOS=1.1;CM-VER=3.0;
2020-8-8, 12:01:19Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=44:a5:6e:36:7f:f0;CMTS-MAC=0c:11:67:02:9e:b1;CM-QOS=1.1;CM-VER=3.0;
2020-8-8, 12:01:18Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=44:a5:6e:36:7f:f0;CMTS-MAC=0c:11:67:02:9e:b1;CM-QOS=1.1;CM-VER=3.0;
2020-8-8, 12:01:17Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=44:a5:6e:36:7f:f0;CMTS-MAC=0c:11:67:02:9e:b1;CM-QOS=1.1;CM-VER=3.0;
2020-8-8, 12:01:16Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=44:a5:6e:36:7f:f0;CMTS-MAC=0c:11:67:02:9e:b1;CM-QOS=1.1;CM-VER=3.0;
2020-8-8, 12:01:15Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=44:a5:6e:36:7f:f0;CMTS-MAC=0c:11:67:02:9e:b1;CM-QOS=1.1;CM-VER=3.0;
2020-8-8, 12:01:14Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=44:a5:6e:36:7f:f0;CMTS-MAC=0c:11:67:02:9e:b1;CM-QOS=1.1;CM-VER=3.0;
2020-8-8, 12:01:13Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=44:a5:6e:36:7f:f0;CMTS-MAC=0c:11:67:02:9e:b1;CM-QOS=1.1;CM-VER=3.0;
2020-8-8, 12:01:12Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=44:a5:6e:36:7f:f0;CMTS-MAC=0c:11:67:02:9e:b1;CM-QOS=1.1;CM-VER=3.0;
2020-8-8, 12:01:11Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=44:a5:6e:36:7f:f0;CMTS-MAC=0c:11:67:02:9e:b1;CM-QOS=1.1;CM-VER=3.0;
2020-8-8, 12:01:10Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=44:a5:6e:36:7f:f0;CMTS-MAC=0c:11:67:02:9e:b1;CM-QOS=1.1;CM-VER=3.0;
2020-8-8, 12:01:06Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=44:a5:6e:36:7f:f0;CMTS-MAC=0c:11:67:02:9e:b1;CM-QOS=1.1;CM-VER=3.0;
2020-8-8, 12:01:05Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=44:a5:6e:36:7f:f0;CMTS-MAC=0c:11:67:02:9e:b1;CM-QOS=1.1;CM-VER=3.0;
2020-8-8, 12:01:03Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=44:a5:6e:36:7f:f0;CMTS-MAC=0c:11:67:02:9e:b1;CM-QOS=1.1;CM-VER=3.0;
2020-8-8, 12:01:02Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=44:a5:6e:36:7f:f0;CMTS-MAC=0c:11:67:02:9e:b1;CM-QOS=1.1;CM-VER=3.0;
2020-8-8, 12:01:01Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=44:a5:6e:36:7f:f0;CMTS-MAC=0c:11:67:02:9e:b1;CM-QOS=1.1;CM-VER=3.0;
2020-8-8, 12:01:00Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=44:a5:6e:36:7f:f0;CMTS-MAC=0c:11:67:02:9e:b1;CM-QOS=1.1;CM-VER=3.0;
2020-8-8, 12:00:59Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=44:a5:6e:36:7f:f0;CMTS-MAC=0c:11:67:02:9e:b1;CM-QOS=1.1;CM-VER=3.0;
 
 

 

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Re: Throttled speeds on wired connection. Netgear AC1900 c7000v2 firmware 1.03.01

You need to post the signal status as well.

 

Please also post the *Downstream Power Level*, the *Upstream Power Level*, and the *SNR* (Signal to Noise Ratio) numbers.





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Re: Throttled speeds on wired connection. Netgear AC1900 c7000v2 firmware 1.03.01

Startup Procedure
Procedure Status Comment
Acquire Downstream Channel627000000 HzLocked
Connectivity StateOKOperational
Boot StateOKOperational
SecurityEnabledBPI+
IP Provisioning ModeHonor MDD

honorMdd(4)

 

Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1LockedATDMA35120 Ksym/sec22800000 Hz38.5 dBmV
2LockedATDMA15120 Ksym/sec35600000 Hz40 dBmV
3LockedATDMA25120 Ksym/sec29200000 Hz40 dBmV
4LockedATDMA45120 Ksym/sec16400000 Hz40 dBmV
5Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
6Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
7Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
8Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV

 

Downstream Bonded Channels (Partial Service)
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1LockedQAM25633627000000 Hz3.1 dBmV38.2 dB190
2LockedQAM25617531000000 Hz4.2 dBmV38.6 dB00
3LockedQAM25618537000000 Hz4.3 dBmV37.6 dB00
4LockedQAM25619543000000 Hz4.4 dBmV37.5 dB00
5LockedQAM25620549000000 Hz4.5 dBmV38.2 dB00
6LockedQAM25621555000000 Hz4.3 dBmV29.7 dB600751448436204
7LockedQAM25622561000000 Hz4.1 dBmV32.6 dB837853447002
8Not LockedUnknown23567000000 Hz0.0 dBmV0.0 dB00
9Not LockedUnknown24573000000 Hz0.0 dBmV0.0 dB00
10Not LockedUnknown25579000000 Hz0.0 dBmV0.0 dB00
11Not LockedUnknown26585000000 Hz0.0 dBmV0.0 dB00
12LockedQAM25627591000000 Hz3.9 dBmV34.9 dB220
13LockedQAM25628597000000 Hz3.7 dBmV36.8 dB00
14LockedQAM25629603000000 Hz3.7 dBmV36.6 dB00
15LockedQAM25630609000000 Hz3.6 dBmV36.8 dB00
16LockedQAM25631615000000 Hz3.4 dBmV37 dB00
17LockedQAM25632621000000 Hz2.7 dBmV37.8 dB00
18LockedQAM25634633000000 Hz2.4 dBmV38.6 dB00
19LockedQAM25635639000000 Hz2.3 dBmV38.5 dB00
20LockedQAM25636645000000 Hz2 dBmV38.3 dB00
21LockedQAM25637651000000 Hz2 dBmV37.9 dB00
22LockedQAM25638657000000 Hz1.9 dBmV37.8 dB00
23LockedQAM25639663000000 Hz2 dBmV37.5 dB00
24LockedQAM25640669000000 Hz2 dBmV37.5 dB00

 

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Expert

Re: Throttled speeds on wired connection. Netgear AC1900 c7000v2 firmware 1.03.01

There are signal problems with downstream channels 6 thru 12. SNR's are too low / out of spec. Some channels are not even locked on to. There may be noise ingressing into the lines somewhere at those frequencies. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, latency problems, and the un-bonding of channels. 

 

Some stuff that you can try;

 

In a self troubleshooting effort to try to obtain better connectivity / more wiggle room, check to see if there are there any excess/unneeded coax cable splitters in the line leading to the modem that can be eliminated/re-configured. Any splitters that remain should be high quality and cable rated for 5-1002 MHz, bi-directional, and no gold colored garbage types like GE, RadioShack, RCA, Philips, Leviton, Magnavox, and Rocketfish from big box stores like Home Depot, Lowes, Target, Wal-Mart etc. Splitters should be swapped with known to be good / new ones to test.

If there aren't any unneeded splitters that can be eliminated and if your coax wiring setup can't be reconfigured so that there is a single two way splitter connected directly off of the drop from the street/pole with one port feeding the modem and the other port feeding the rest of the house/equipment with additional splits as needed, and you've checked all the wiring and fittings for integrity and tightness and refresh them by taking them apart then check for and clean off any corrosion / oxidation on the center wire and put them back together again, then perhaps it's best to book a tech visit to investigate and correct.



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Re: Throttled speeds on wired connection. Netgear AC1900 c7000v2 firmware 1.03.01

I found a box outside my apartment building which had what I can only describe as a coax splitter with apartment numbers on them and coax cables attached beside the number which all fed down into the ground after that so I couldn't follow them more. I did make sure my line was tight with my fingers but didn't want to touch it more than that. It was tight and speeds are still being throttled.

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Re: Throttled speeds on wired connection. Netgear AC1900 c7000v2 firmware 1.03.01

If there is nothing more that you can do, then as stated, get a tech out to investigate / correct the problem. Good luck !



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