Virgin Media Community

[kmb786]

Hi,

I am on the M500 package for some time now and SH3 running in "Modem" mode with a third party Netgear router connected to the SH3.

Over the last few days I have noticed the speed to be low as I am getting around 190-210mbps on a wired connection using Speedtest - I was usually getting 400+mbps on wired and wifi but its all dropped.

I attach the SH3 results below so can someone please advise.

Thank you.

Downstream bonded channels

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

1	363000000	8	40	256 qam	29
2	203000000	6.5	38	256 qam	9
3	211000000	6.8	38	256 qam	10
4	219000000	6.6	38	256 qam	11
5	227000000	6.5	38	256 qam	12
6	235000000	6.5	38	256 qam	13
7	243000000	6.1	38	256 qam	14
8	251000000	6	38	256 qam	15
9	259000000	6.3	38	256 qam	16
10	267000000	6.5	38	256 qam	17
11	275000000	6.6	40	256 qam	18
12	283000000	6.6	38	256 qam	19
13	291000000	6.6	38	256 qam	20
14	299000000	7.3	38	256 qam	21
15	307000000	7	38	256 qam	22
16	315000000	7	38	256 qam	23
17	323000000	7.5	38	256 qam	24
18	331000000	7.5	38	256 qam	25
19	339000000	7.9	38	256 qam	26
20	347000000	8	38	256 qam	27
21	355000000	7.9	38	256 qam	28
22	371000000	8.1	40	256 qam	30
23	379000000	7.5	38	256 qam	31
24	387000000	7.6	40	256 qam	32

Downstream bonded channels

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

1	Locked	40.9	11	0
2	Locked	38.6	33	0
3	Locked	38.6	19	0
4	Locked	38.6	19	0
5	Locked	38.6	26	0
6	Locked	38.6	13	0
7	Locked	38.9	35	0
8	Locked	38.6	23	0
9	Locked	38.9	13	0
10	Locked	38.6	15	0
11	Locked	40.3	18	0
12	Locked	38.9	18	0
13	Locked	38.6	26	0
14	Locked	38.9	20	0
15	Locked	38.6	27	0
16	Locked	38.6	13	0
17	Locked	38.9	18	0
18	Locked	38.6	38	0
19	Locked	38.9	12	0
20	Locked	38.9	13	0
21	Locked	38.9	20	0
22	Locked	40.3	10	0
23	Locked	38.9	21	0
24	Locked	40.9	13	0

Upstream bonded channels

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

1	39400000	38.8	5120	64 qam	10
2	25800000	37.3	5120	64 qam	12
3	32600000	37.3	5120	64 qam	11
4	46199954	38.8	5120	64 qam	9

Upstream bonded channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

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

[-tony-]

levels look ok - try a test without your router - connect direct to the hub in modem mode - try different test sites and different servers - some give differing results 

for example i constantly get poor results on https://proof.ovh.net where as all other test sites give similar results

[kmb786]

Hi

Thanks for the reply. I’ll try a test direct with the router. 

[Lee_R]

Hi @kmb786, thanks for posting and welcome back to our community.

Sorry to hear of your slow speeds.  Did you manage to test your hub directly?  If so, what speeds are you achieving via the wired connection?

Regards

Lee_R

[kmb786]

Hi All,

I've managed to do some further tests as below and need help now as to what the cause might be.

1. Reset the SH3 factory default

2. Only connected one wired device to the PC and did a speed test - download speed was 490-510mbps which is what I should be exoecting

3. Disconnected everything and put the SH3 in Modem mode and connected it to my Netgear Nighthawk X6 R8000 router and after rebooting everything did a speed test and now get 180-190mbps download speed.

Therefore, there is something to do with the router and I'm not sure what.  The router has the latest firmware installed and I have not made any config config changes.

I had this exact problem when I first upgraded to the M500 speed and was solved by installing the latest firmware on the router but now had the same issue again since noticing just before the Christmas period.

Therefore would appreciate of some help here.

Thanks

[lotharmat]

Has QoS been enabled on the Nighthawk?

[kmb786]

Hi

Enable Dynamic QoS is not ticked.

Thanks

[-tony-]

2 things 

1 - do a speed test with a pc connected directly to the hub but have the hub in modem mode - cannot see that being the cause but it proves it either way

2 - reset your own router then connect it all up and again do a speed test

[kmb786]

Tony

1. I couldn’t seem to get an internet connection when directly connected to the SH3 in modem mode - I tried the following unless I’m doing something wrong. 
a) the SH3 in modem mode has ip 192.168.100.1

b) I configure my pc with ip 192.168.100.10 sm 255.255.255.0 gw 192.168.100.1 dns 192.168.100.1 and connected to any port on the SH3 but would not get an internet connection. 

2.  When you say reset the router, do you mean do an actual factory reset as it’s rebooted many times. 

Thanks

[John_GS]

Hi kmb786

Thanks for posting. Sorry to hear of any low speeds. I've done a system check today and no issues are showing, no outages. Your power levels are slightly high on the downstream but are in spec. Upstream is fine. Congestion and SNR are both fine also. 

Can you post your Hub status and logs? How to do this;
• Please go to http://192.168.0.1 (or http://192.168.100.1 - if in modem mode), 
• Don't log in, click on 'router status' 
• Copy/paste the data from each of the tabs as text into a 'REPLY' as opposed to 'QUICK REPLY'. Please do not include your MAC address.
Also, set up a Broadband Quality Monitor. This will monitor the state of your connection and record any network dropouts etc 
Give it a while to gather data and then click 'Share Live graph' and paste the 'Direct Link' into the forum 🙂

Best,