Sporadic slow upload speeds

[Swaino]

I recently renewed my broadband contract and upgraded from the M350 to the M500, since then of an evening my upload speed goes very low, impacting my gaming.

What will happen is i'll start to lag on my Xbox (wired) and on particular games it will complain about my connection and will often kick me, I can then confirm on my wired PC that my upload speed is very low.

I never encountered this issue on the M350. 

On the status checker I see "We can’t see any issues affecting". I was advised I didn't need a new Hub, my hardware hasn't changed since I was given the Hub 3 many years ago, I have a 3dB Attenuator on the back of my Hub which has also been there since I received the Hub 3.

Can someone from VM please check my levels,

[Swaino]

Cable Modem StatusItem Status Comments

Acquired Downstream Channel (Hz)	138750000	Locked
Ranged Upstream Channel (Hz)	25799932	Locked
Provisioning State	Online

Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID

1	138750000	5.5	41	256 qam	1
2	146750000	5.4	43	256 qam	2
3	154750000	5.1	43	256 qam	3
4	162750000	4.9	43	256 qam	4
5	170750000	4.9	43	256 qam	5
6	178750000	4.8	43	256 qam	6
7	186750000	4.8	43	256 qam	7
8	194750000	4.9	43	256 qam	8
9	202750000	4.9	43	256 qam	9
10	210750000	4.5	43	256 qam	10
11	218750000	4.6	43	256 qam	11
12	226750000	4.6	43	256 qam	12
13	234750000	4.4	43	256 qam	13
14	242750000	4.4	43	256 qam	14
15	250750000	3.7	40	256 qam	15
16	258750000	4.3	43	256 qam	16
17	266750000	4.5	43	256 qam	17
18	274750000	4.4	43	256 qam	18
19	282750000	4.4	44	256 qam	19
20	290750000	4.4	43	256 qam	20
21	298750000	4.4	43	256 qam	21
22	306750000	4.3	43	256 qam	22
23	314750000	4.4	43	256 qam	23
24	322750000	4.1	40	256 qam	24

[Swaino]

Downstream bonded channels

Channel Locked Status RxMER (dB) Pre RS Errors Post RS Errors

1	Locked	41.6	609	631
2	Locked	43.3	4043	686
3	Locked	43.3	463	663
4	Locked	43.3	452	339
5	Locked	43.3	284	176
6	Locked	43.3	164	409
7	Locked	43.3	292	165
8	Locked	43.3	179	0
9	Locked	43.3	199	71
10	Locked	43.3	6118	5718
11	Locked	43.3	234	187
12	Locked	43.3	177	25
13	Locked	43.3	61	0
14	Locked	43.3	81	0
15	Locked	40.9	131	0
16	Locked	43.3	151	0
17	Locked	43.3	150	0
18	Locked	43.3	68	0
19	Locked	44.6	58	0
20	Locked	43.3	92	16
21	Locked	43.3	17	0
22	Locked	43.3	16	0
23	Locked	43.3	39	0
24	Locked	40.9	19	0

Upstream bonded channels

Channel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID

1	25799932	38.3	5120	64 qam	6
2	32599791	38.3	5120	64 qam	5
3	39399659	39.8	5120	64 qam	4
4	46199605	39.8	5120	64 qam	3

Upstream bonded channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1	ATDMA	0	0	2	0
2	ATDMA	0	0	1	0
3	ATDMA	0	0	2	0
4	ATDMA	0	0	0	0

General Configuration

Network access	Allowed
Maximum Number of CPEs	1
Baseline Privacy	Enabled
DOCSIS Mode	Docsis30
Config file	4ncxv9873254k;fg87dsfd;kf

Primary Downstream Service Flow

SFID	56
Max Traffic Rate	575000085
Max Traffic Burst	42600
Min Traffic Rate	0

Primary Upstream Service Flow

SFID	55
Max Traffic Rate	55000085
Max Traffic Burst	42600
Min Traffic Rate	0
Max Concatenated Burst	42600
Scheduling Type	BestEffort

Network Log

Time Priority Description

27/08/2023 19:07:13	notice	LAN login Success;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
27/08/2023 07:44:55	Warning!	RCS Partial Service;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
27/08/2023 06:51:29	critical	No Ranging Response received - T3 time-out;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
27/08/2023 06:51:28	critical	Unicast Ranging Received Abort Response - initializing MAC;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
27/08/2023 01:31:24	critical	No Ranging Response received - T3 time-out;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
26/08/2023 23:23:37	Warning!	RCS Partial Service;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
26/08/2023 23:23:21	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
26/08/2023 23:23:21	Warning!	RCS Partial Service;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
25/08/2023 23:22:26	notice	DHCP Renew - lease parameters tftp file-cmreg-vmdg505-bbt053-b.cm modified;CM-MAC=63;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
25/08/2023 23:22:26	Error	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
25/08/2023 04:01:25	critical	No Ranging Response received - T3 time-out;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
23/08/2023 22:47:37	notice	LAN login Success;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
21/08/2023 16:06:20	critical	No Ranging Response received - T3 time-out;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
20/08/2023 23:50:30	notice	DHCP Renew - lease parameters tftp file-cmreg-vmdg505-bbt053-b.cm modified;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
20/08/2023 23:50:30	Error	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
20/08/2023 21:26:53	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
19/08/2023 23:49:31	critical	No Ranging Response received - T3 time-out;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
19/08/2023 08:21:36	Warning!	RCS Partial Service;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
17/08/2023 12:51:53	notice	DHCP Renew - lease parameters tftp file-cmreg-vmdg505-bbt053-b.cm modified;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
17/08/2023 12:51:53	Error	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;

[Client62]

The severe drops of upstream speed are most likely a local service fault.
Check on 0800 561 0061 to see if a fault is reported for your street.

[Swaino]

---

@Client62 wrote:

The severe drops of upstream speed are most likely a local service fault.
Check on 0800 561 0061 to see if a fault is reported for your street.

---

Thanks for the tip, would that number be the same as checking the service status page? I did mention in OP I checked that page while the issue was happening, On the status checker I see "We can’t see any issues affecting"

Either way I called the number and right now its not saying any issues, my upload speeds are also back to normal as this only seems to happen at night.

[Adduxi]

You have noise ingress (or similar) hence the PostRS errors.  This will need fixed by VM.

Also setup a BQM to monitor the circuit,  www.thinkbroadband.com/ping

Hopefully this will show why your circuit is performing badly in the evenings.

[Swaino]

Cheers, have set that up. How do I go about getting this fixed by VM? I see they respond sometimes on threads here, or do I need to just call them?

[Adduxi]

It’s up to you as this is a Community forum and it might take several days for a VM Mod to pick this up and respond. 

[Swaino]

Thanks, its already happening tonight. I can see lots of packet loss and once again my upload speed is below 2Mbps.

https://www.thinkbroadband.com/broadband/monitoring/quality/share/2913484e6738f9b1a64de9b3baf8979df5...

[Swaino]

Had complete outage yesterday night, at about 10:30 even my download speed suffered as website were slow to load. I just went to sleep 😞