Virgin Media core network latancy fault

[RR-IT-GUY]

Hi All,

I am a network engineer and have picked up on a few issues tonight.

Feel free to take a look at my BMQ but if thought I would mentino I noticed an issue when trying to do app updates on the apple app store this evening, none were possible as they were being slow and timing out, I just checked my charts and saw the horror is back.

Routing issues

Not only on my connection but a load of other VM connections I look at

BMQ 2022 10 17

Live BMQ

A friend Live

A friend 2022 10 17

another Friends Live

that other friends 2022 10 17

A pattarn is showing up.


tracert thinkbroadband.com

Tracing route to thinkbroadband.com [80.249.106.141]
over a maximum of 30 hops:

1 <1 ms <1 ms <1 ms 10.0.0.1
2 * * * Request timed out.
3 15 ms 18 ms 13 ms nrth-core-2b-xe-834-0.network.virginmedia.net [80.1.203.105]
4 * * * Request timed out.
5 * * * Request timed out.
6 * * * Request timed out.
7 61 ms 60 ms 51 ms host-62-254-42.174.not-set-yet.virginmedia.net.42.254.62.in-addr.arpa [62.254.42.174]
8 * * * Request timed out.
9 50 ms 52 ms 47 ms uk-lon01c-ri2-ae-6-0.aorta.net [84.116.136.98]
10 47 ms 44 ms 39 ms ae-8.a02.londen12.uk.bb.gin.ntt.net [129.250.66.101]
11 44 ms 44 ms 45 ms ae-0.r20.londen12.uk.bb.gin.ntt.net [129.250.3.212]
12 48 ms 48 ms 40 ms ae-13.a03.londen12.uk.bb.gin.ntt.net [129.250.3.249]
13 47 ms 43 ms 41 ms 192.80.16.146
14 40 ms 36 ms 38 ms ae11-11.edge-rt1.thn.ncuk.net [80.249.97.20]
15 39 ms 39 ms 47 ms te1-52-61.core-rs3.lcy.ncuk.net [80.249.97.103]
16 53 ms 58 ms 48 ms te1-49-62.core-rs4.lcy.ncuk.net [80.249.97.99]
17 42 ms 49 ms 45 ms ip106-141.thdo.ncuk.net [80.249.106.141]

Trace complete.

[RR-IT-GUY]

Slow speeds

I will attach some HUB stats but its not a HUB fault it is core network and affecting multiple networks.

[RR-IT-GUY]

[RR-IT-GUY]

Cable Modem StatusItem Status CommentsChannel Overview Downstream Upstream

Cable Modem Status	Online	DOCSIS 3.1
Primary downstream channel	Locked	SC-QAM
DOCSIS 3.0 channels	31	5
DOCSIS 3.1 channels	1	1

Network log empty

General Configuration

Network access	true
Maximum Number of CPEs	1
Baseline Privacy	true
DOCSIS Mode	3.1
Config file	cmreg-vmdg640-bbt053-b.cm

Primary Downstream Service Flow

SFID	14120
Max Traffic Rate	575000000
Max Traffic Burst	42600
Min Traffic Rate	0

Primary Upstream Service Flow

SFID	14119
Max Traffic Rate	38520000
Max Traffic Burst	42600
Min Traffic Rate	0
Max Concatenated Burst	16320
Scheduling Type	bestEffort

[RR-IT-GUY]

3.0 Downstream channels

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

40	451000000	4.300003	38.983261	QAM256	40
12	227000000	5.599998	40.366287	QAM256	12
10	211000000	5.699997	40.366287	QAM256	10
11	219000000	5.800003	40.946209	QAM256	11
13	235000000	5.599998	38.983261	QAM256	13
14	243000000	5.400002	40.366287	QAM256	14
15	251000000	5.300003	40.946209	QAM256	15
16	259000000	5.400002	40.366287	QAM256	16
17	267000000	5.500000	38.983261	QAM256	17
18	275000000	5.400002	40.946209	QAM256	18
19	283000000	5.099998	40.366287	QAM256	19
20	291000000	4.900002	40.366287	QAM256	20
21	299000000	5.099998	40.366287	QAM256	21
22	307000000	5.500000	40.366287	QAM256	22
23	315000000	5.300003	38.983261	QAM256	23
24	323000000	4.900002	40.366287	QAM256	24
25	331000000	5.000000	38.983261	QAM256	25
26	339000000	5.000000	40.366287	QAM256	26
27	347000000	4.900002	38.983261	QAM256	27
28	355000000	4.699997	38.983261	QAM256	28
29	363000000	4.599998	38.983261	QAM256	29
30	371000000	4.599998	38.983261	QAM256	30
31	379000000	4.699997	38.605377	QAM256	31
32	387000000	4.599998	38.983261	QAM256	32
33	395000000	4.599998	38.983261	QAM256	33
34	403000000	4.599998	40.366287	QAM256	34
35	411000000	4.300003	38.983261	QAM256	35
36	419000000	4.099998	38.983261	QAM256	36
37	427000000	4.199997	38.605377	QAM256	37
38	435000000	4.000000	38.983261	QAM256	38
39	443000000	4.199997	38.983261	QAM256	39

3.0 Downstream channels

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

40	Locked	38.983261	32	0
12	Locked	40.366287	47	0
10	Locked	40.366287	55	0
11	Locked	40.946209	41	0
13	Locked	38.983261	45	0
14	Locked	40.366287	32	0
15	Locked	40.946209	35	0
16	Locked	40.366287	31	0
17	Locked	38.983261	42	0
18	Locked	40.946209	36	0
19	Locked	40.366287	38	0
20	Locked	40.366287	41	0
21	Locked	40.366287	51	0
22	Locked	40.366287	57	0
23	Locked	38.983261	54	0
24	Locked	40.366287	53	0
25	Locked	38.983261	58	0
26	Locked	40.366287	58	0
27	Locked	38.983261	71	0
28	Locked	38.983261	95	0
29	Locked	38.983261	115	0
30	Locked	38.983261	106	0
31	Locked	38.605377	99	0
32	Locked	38.983261	93	0
33	Locked	38.983261	65	0
34	Locked	40.366287	43	0
35	Locked	38.983261	71	0
36	Locked	38.983261	80	0
37	Locked	38.605377	60	0
38	Locked	38.983261	56	0
39	Locked	38.983261	44	0

3.1 Downstream channels

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

41

96

4K

1880

QAM4096

759

3.1 Downstream channels

Channel ID Lock Status RxMER Data (dB) PLC Power (dBmV) Correcteds (Active Profile) Uncorrectables (Active Profile)

41

Locked

41

1.9

1620168830

969

[RR-IT-GUY]

3.0 Upstream channels

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

1	36600000	42.020599	5120 KSym/sec	64QAM	3
2	43100000	42.270599	5120 KSym/sec	64QAM	2
3	23600000	41.270599	5120 KSym/sec	64QAM	5
4	30100000	42.020599	5120 KSym/sec	64QAM	4
5	49600000	42.520599	5120 KSym/sec	64QAM	1

3.0 Upstream channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1	US_TYPE_STDMA	0	0	2	0
2	US_TYPE_STDMA	0	0	2	0
3	US_TYPE_STDMA	0	0	3	0
4	US_TYPE_STDMA	0	0	1	0
5	US_TYPE_STDMA	0	0	1	0

3.1 Upstream channels

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

6

10.8

38.2

2K

QAM8

3.1 Upstream channels

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

6

OFDMA

220

53.4

1

0

[risc19]

AH!

THE DREDDED HUMP IS BACK!

So this happened before, except it was over the entire network last time.

It happened at the same time every single day like clockwork.

Virgin denied it was anything to do with them and blamed thinkbroadband.

It wasn't thinkbroadband then virgin fixed it, fun story huh?

P.S All your router stats look absolutely fine.

Link to original thread.....

https://community.virginmedia.com/t5/Networking-and-WiFi/VM-CORE-NETWORK-FAILURE-URGANT/td-p/4986440

[RR-IT-GUY]

I just took a look on my cloud controller for my network and can see that the router is reporting latency of over 5196 

[RR-IT-GUY]

Tell me about it, it seems to be regional, east of england, thanks for the link to my last thread, lost that one.

No problem at all, its good to get someone else to confirm the HUB stats, they look quite good considering my uptime although a reboot is scheduled in as part of my cable tidy and reroute plannd this month (just haven't decided when yet).

[RR-IT-GUY]