Virgin Media Community

[JimOver]

Wired connection, GigE, various machines testing, and I usually see 70 or so, with occasional peaks over 100... Any suggestions? Reboots, nothing really seems to change what we're seeing... 

Thanks!

Channel	Frequency (Hz)	Power (dBmV)	SNR (dB)	Modulation	Channel ID
1	307000000	7	40	256 qam	22
2	203000000	6.4	40	256 qam	9
3	211000000	6	40	256 qam	10
4	219000000	5.9	40	256 qam	11
5	227000000	5.9	40	256 qam	12
6	235000000	5.5	40	256 qam	13
7	243000000	5	40	256 qam	14
8	251000000	3.9	40	256 qam	15
9	259000000	4	40	256 qam	16
10	267000000	5.3	40	256 qam	17
11	275000000	5.6	40	256 qam	18
12	283000000	6.4	40	256 qam	19
13	291000000	6.5	40	256 qam	20
14	299000000	7	40	256 qam	21
15	315000000	7.1	40	256 qam	23
16	323000000	7.1	40	256 qam	24
17	426750000	7	40	256 qam	25
18	434750000	6.9	40	256 qam	26
19	442750000	7	40	256 qam	27
20	450750000	7	40	256 qam	28
21	458750000	6.9	40	256 qam	29
22	466750000	6.5	40	256 qam	30
23	474750000	6	40	256 qam	31
24	482750000	5.6	40	256 qam	32

Channel	Locked Status	RxMER (dB)	Pre RS Errors	Post RS Errors
1	Locked	40.9	8974	8671
2	Locked	40.9	1952	29340
3	Locked	40.3	7776	29528
4	Locked	40.9	13521	22948
5	Locked	40.3	18092	17136
6	Locked	40.3	21108	11024
7	Locked	40.3	18466	10944
8	Locked	40.3	15203	19712
9	Locked	40.9	15903	18656
10	Locked	40.9	18399	11311
11	Locked	40.9	17920	11954
12	Locked	40.3	16917	9416
13	Locked	40.9	15754	9711
14	Locked	40.9	13842	10219
15	Locked	40.9	8910	8747
16	Locked	40.3	13024	7244
17	Locked	40.9	12862	7512
18	Locked	40.3	14176	8376
19	Locked	40.9	11073	9923
20	Locked	40.9	9408	11328
21	Locked	40.3	4602	11704
22	Locked	40.9	3540	2025
23	Locked	40.9	2591	3507
24	Locked	40.9	2668	10498

Channel	Frequency (Hz)	Power (dBmV)	Symbol Rate (ksps)	Modulation	Channel ID
1	46200000	4.675	5120	64 qam	85
2	25800000	4.6	5120	64 qam	88
3	32600000	4.575	5120	64 qam	87
4	39400000	4.65	5120	64 qam	86

Channel	Channel Type	T1 Timeouts	T2 Timeouts	T3 Timeouts	T4 Timeouts
1	ATDMA	0	0	0	0
2	ATDMA	0	0	0	0
3	ATDMA	0	0	0	0
4	ATDMA	0	0	0	0

[SCA1972 · Accepted solution]

Power levels look OK.  A lot of Post RS errors which is not healthy, assuming that the hub has been rebooted very recently and that is not just a historical build up of errors.

Posting the network log might help, to show some correlation with the Post RS errors.

______________________
Scott

Disclaimer - I don't work for Virgin Media. I'm just another VM user trying to help out.
My setup: V6 TV box, M350 Fibre broadband with Hub 3 in modem mode connected to a Netgear R7000 router. Telewest/VM user since 2001.

[JimOver]

Ok, I think this is what you suggested?

Time	Priority	Description
3/10/2019 11:15	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
4/10/2019 20:45	Error	DHCP RENEW sent - No response for IPv4;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
5/10/2019 16:27	Error	DHCP REBIND WARNING - Field invalid in response;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
6/10/2019 17:07	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
10/10/2019 6:32	Error	DHCP RENEW sent - No response for IPv4;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
11/10/2019 12:33	Error	DHCP REBIND WARNING - Field invalid in response;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
11/10/2019 13:59	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
12/10/2019 17:59	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
12/10/2019 17:59	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
12/10/2019 17:59	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
12/10/2019 17:59	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
12/10/2019 17:59	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
12/10/2019 17:59	Warning!	Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
12/10/2019 17:59	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
12/10/2019 17:59	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
12/10/2019 18:07	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
12/10/2019 18:07	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
12/10/2019 18:07	Warning!	Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
12/10/2019 18:07	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
13/10/2019 02:01:44	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

[John_GS · Accepted solution]

Hi JimOver,

Thanks for posting and welcome to the community. Sorry for the lower than expected speeds, I've ran a check and no issues showing. 

Can you do a PIN reset for me on the router and then do a speedtest via computer, with ethernet at speedtest.net with only 1 device connected?

Kind regards,

[JimOver]

Good afternoon - 

OK, with the modem on, I held in the rear reset button for 60 seconds. Power cycled, and on restart with only my computer connected directly via ETH to the modem, no real change. 93 down, 35 up. 

Any more suggestions?

Thanks,

-Jim

[John_GS · Accepted solution]

Thanks for doing that, can you try your device in safe mode, and then doing the speedtest again for me?

Kind regards,

[JimOver]

Hello - 

Safe mode (with networking) attempted - as well I can run a test from my hard wired LAN controller, same result - 85-90 down each time. 

Thanks!

[John_GS]

Can you try the hub in modem mode, is this a possibility? 

Kind regards,

[jbrennand · Accepted solution]

---

@JimOver wrote:

Hello - 

Safe mode (with networking) attempted - as well I can run a test from my hard wired LAN controller, same result - 85-90 down each time. 

Thanks!

---

Those speeds are suspiciously like what you would get on a 10/100 device that wasn't gigabit enabled.  What device are you testing on and what NIC card does the device have and are the drivers up to date? Is there a 10/100 switch in the loop somewhere?

[JimOver]

You ain't wrong. I just found a bad patch cable between my security gateway and the modem, and I'm back to where I once was - 190 or so. Still not 300, but the bad patch was skewing results from my normally truted connection. 

Laptop claims a Gig connection, but I'll find another adapter and try it again, just in case... 

Anyone with any ideas on the throughput differences with the Virgin Hub 3.0 in straight modem/Gateway vs. Router mode?