Do I have a latency issue?

[HergestPhil]

I was on 250Mbps via a SuperHub 3, but yesterday switched to 1Gbps via Superhub 5.

I initially had a bit of a flakey connection, but reconnected the copper cable to the white wall socket that hadn't been tightened by the engineer properly.  Rebooted router.  BMQ now looks mostly okay, Router stats not too bad.

But various speed/latency/bufferbloat tests give quite a wide range of results.  I was expecting better quality than with the Hub 3, but it felt like I had a more consistent quality connection with my hub 3 250Mbps connection, lower average ping for example playing some games, such as Rocket League.

My Upstream seems rock solid, with all tests showing consistent 100Mbps with low active load latency (grade A on the buffer bloat test, +2ms latency).

It's the download that seems a bit flakey still (buffer bloat test often reports a grade E downstream, with my downstream active load latency at +54ms).

Download speed tests seem to report varying figures, averaging around 780Mbps, running on a PC connected with gigabit ethernet.

Downstream power levels for channels range between 3.8 to 7.5, SNR 41-42.  Over a 24 hour period, I seem to have accululated in the range of 4 to 13 Pre RS errors on each channel.  No Post RS errors though.

3.1 Downstream channels, Active Profile corrected errors is now over 875M (no uncorrectable errors though).

[HergestPhil]

I have noticed a small amount of packet loss on BMQ graph.

2am - 9am had a more consistent latency.  I see more variance in the average latency and maximum latency this afternoon/evening.

[HergestPhil]

Waveform Buffer Bloat test:

[HergestPhil]

This seems to suggest that perhaps the connection from the hub to desktop PC (via ethernet cable) is introducing additional latency and jitter.  Are all ports equal on the Hub 5?  Perhaps the ethernet cable should be replaced (it's not marked what grade it is - blue colour, I think it came with the Hub 3).  Would Cat 5E be fine, or should I get Cat 6 or higher?

[legacy1]

Your connection looks fine Buffer Bloat happens on load as to how limiting handles traffic which you may be buffer at the hub normally on lower speed package or at VM gateway to buffer as HFQ should their be load by others in your area meaning you can't hit your full speed.

[HergestPhil]

I am less worried about full speed, more worried about latency.  It seems that when I run Rocket League now, I am seeing slightly higher pings (maybe 5-10ms higher than I used to see).  On the BMQ graph during prime times, I am seeing more blue colour than previously, meaning my average ping has more variance (jitter?).  I do wonder if the connection from router to PC is actually adding a bit more latency, and will try to get a new CAT 5E or 6 cable, if that could be the problem?

[carl_pearce]

All looks normal for a VM connection using DOCSIS.

In fact it looks like a very good connection in your area.

My area for comparison (Rebooted at 8pm!):

Technically there could be a fault in the area, however unsure if VM would acknowledge.

Assuming your HUB 5 is on the latest firmware what do the upstream stats look like?

[HergestPhil]

Here are my downstream stats:

3.0 Downstream channels

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

1	331000000	5.3	40	QAM 256	25
2	179000000	7.5	42	QAM 256	6
3	187000000	7.6	42	QAM 256	7
4	195000000	7.7	42	QAM 256	8
5	203000000	7.5	42	QAM 256	9
6	211000000	7.4	42	QAM 256	10
7	219000000	7.3	42	QAM 256	11
8	227000000	7.2	42	QAM 256	12
9	235000000	7.1	42	QAM 256	13
10	243000000	7	42	QAM 256	14
11	251000000	6.7	42	QAM 256	15
12	259000000	6.4	41	QAM 256	16
13	267000000	6.3	41	QAM 256	17
14	275000000	6.1	41	QAM 256	18
15	283000000	5.9	41	QAM 256	19
16	291000000	5.8	41	QAM 256	20
17	299000000	5.7	41	QAM 256	21
18	307000000	5.8	41	QAM 256	22
19	315000000	5.7	41	QAM 256	23
20	323000000	5.6	40	QAM 256	24
21	339000000	5.3	41	QAM 256	26
22	347000000	5.1	41	QAM 256	27
23	355000000	5.1	41	QAM 256	28
24	363000000	4.9	41	QAM 256	29
25	371000000	4.8	41	QAM 256	30
26	379000000	5	41	QAM 256	31
27	387000000	4.8	41	QAM 256	32
28	395000000	4.6	41	QAM 256	34
29	403000000	4.5	41	QAM 256	35
30	411000000	4.3	41	QAM 256	36
31	419000000	4.2	41	QAM 256	37

3.0 Downstream channels

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

1	Locked	40	26	0
2	Locked	42	24	0
3	Locked	42	16	0
4	Locked	42	26	0
5	Locked	42	18	0
6	Locked	42	21	0
7	Locked	42	17	0
8	Locked	42	13	0
9	Locked	42	17	0
10	Locked	42	13	0
11	Locked	42	29	0
12	Locked	41	20	0
13	Locked	41	12	0
14	Locked	41	29	0
15	Locked	41	20	0
16	Locked	41	26	0
17	Locked	41	26	0
18	Locked	41	30	0
19	Locked	41	32	0
20	Locked	40	25	0
21	Locked	41	39	0
22	Locked	41	35	0
23	Locked	41	44	0
24	Locked	41	44	0
25	Locked	41	47	0
26	Locked	41	56	0
27	Locked	41	38	0
28	Locked	41	49	0
29	Locked	41	42	0
30	Locked	41	27	0
31	Locked	41	42	0

3.1 Downstream channels

Channel Channel Width (MHz) FFT Type Number of Active Subcarriers Modulation (Active Profile) First Active Subcarrier (Hz)

33

94

4K

1840

QAM 4096

1108

3.1 Downstream channels

Channel ID Locked Status RxMER Data (dB) PLC Power (dBmV) Corrected errors (Active Profile) Uncorrectable errors (Active Profile)

33

Locked

41

3.2

3016234918

5

[HergestPhil]

Here's the upstream stats:

3.0 Upstream channels

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

0	49600000	41.3	5120	QAM 64	1
1	43100000	40.5	5120	QAM 64	2
2	36600000	40.3	5120	QAM 64	3
3	30100000	39.8	5120	QAM 64	4
4	23600000	39.3	5120	QAM 64	5

3.0 Upstream channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

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

3.1 Upstream channels

Channel Channel Width (MHz) Power (dBmV) FFT Type Modulation

12

10.4

37.2

2K

QAM 256

3.1 Upstream channels

Channel Channel Type Number of Active Subcarriers First Active Subcarrier (Hz) T3 Timeouts T4 Timeouts

12

OFDMA

208

74000000

0

0

[HergestPhil]

I have noticed that I get a lag spike, often associated with packet loss, repeatedly exactly every 8 hours, just before 6am, 2pm, 10pm.  Seems to happen every day at exactly the same time.