Maximum Latency Spikes Every Hour

[tdbegley28]

Hello all,

Just after some quick help. I have been monitoring my connection on thinkbroadband and notice a maximum latency spike every hour without fail. Can someone explain what this means and if its ok as I also monitor some other family members connections and I do not see the same happen on their graphs.

Thank you.

[Adduxi]

As you are using a Hub 5. note it's still on trial and by invite only, so expect unusual things.

Having said that, try a pinhole reset to force down the latest firmware, just in case.

[tdbegley28]

Thanks for the reply.

Yes I am on the Hub 5 so do understand its in trial, maybe this issue/non issue will help VM staff on here.

I have done a reset a few times, the current software version on the hub is:
Software version : LG-RDK_2.23.11-2106.14

If it helps the info from the hub is as follows:

Item Status Comments

Acquired Downstream Channel(Hz)	331000000	Locked
Ranged Upstream Channel(Hz)	46200000	Ranged
Provisioning State	Online	Operational

Downstream bonded channels

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

1	331000000	4	41	QAM 256	25
2	139000000	5.3	41	QAM 256	1
3	147000000	5.2	41	QAM 256	2
4	155000000	5.1	41	QAM 256	3
5	163000000	5.2	41	QAM 256	4
6	171000000	4.9	41	QAM 256	5
7	179000000	4.8	41	QAM 256	6
8	187000000	4.8	42	QAM 256	7
9	195000000	5	42	QAM 256	8
10	203000000	4.9	42	QAM 256	9
11	211000000	5	42	QAM 256	10
12	219000000	4.7	41	QAM 256	11
13	227000000	4.7	42	QAM 256	12
14	235000000	4.5	41	QAM 256	13
15	243000000	4.1	41	QAM 256	14
16	251000000	3.6	41	QAM 256	15
17	259000000	3.1	41	QAM 256	16
18	267000000	2.8	41	QAM 256	17
19	275000000	2.7	41	QAM 256	18
20	283000000	3.3	41	QAM 256	19
21	291000000	3.8	41	QAM 256	20
22	299000000	4.2	41	QAM 256	21
23	307000000	4.1	41	QAM 256	22
24	315000000	4.2	41	QAM 256	23
25	323000000	4	41	QAM 256	24
26	339000000	3.8	41	QAM 256	26
27	347000000	3.9	41	QAM 256	27
28	355000000	4	41	QAM 256	28
29	363000000	4.3	41	QAM 256	29
30	371000000	4.2	41	QAM 256	30
31	379000000	4	41	QAM 256	31

Downstream bonded channels

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

1	Locked	41	0	20
2	Locked	41	0	29
3	Locked	41	0	25
4	Locked	41	0	18
5	Locked	41	0	26
6	Locked	41	0	49
7	Locked	41	0	13
8	Locked	42	0	24
9	Locked	42	0	18
10	Locked	42	0	13
11	Locked	42	0	21
12	Locked	41	0	11
13	Locked	42	0	21
14	Locked	41	0	25
15	Locked	41	0	23
16	Locked	41	0	21
17	Locked	41	0	21
18	Locked	41	0	29
19	Locked	41	0	17
20	Locked	41	0	34
21	Locked	41	0	25
22	Locked	41	0	22
23	Locked	41	0	30
24	Locked	41	0	24
25	Locked	41	0	25
26	Locked	41	0	33
27	Locked	41	0	25
28	Locked	41	0	28
29	Locked	41	0	29
30	Locked	41	0	19
31	Locked	41	0	19

[tdbegley28]

Upstream bonded channels

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

1	46200000	40.8	5120	QAM 64	3
2	39400000	40.5	5120	QAM 64	4
3	32600000	40.3	5120	QAM 64	5
4	25800000	40.3	5120	QAM 64	6

Upstream bonded channels

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

General Configuration

Network accessMaximum Number of CPEsBaseline PrivacyDOCSIS ModeConfig file

Allowed

1

Enabled

3.1

cmreg-vmdg660-bbt076-b.cm

Primary Downstream Service Flow

SFIDMax Traffic RateMax Traffic BurstMin Traffic Rate

148708

1230000450 bps

42600 bytes

0 bps

Primary Upstream Service Flow

SFIDMax Traffic RateMax Traffic BurstMin Traffic RateMax Concatenated BurstScheduling Type

148707

55000270 bps

42600 bytes

0 bps

42600 bytes

Best Effort

[tdbegley28]

Network Log

Time Priority Description

09-12-2021 16:20:25	error	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
09-12-2021 15:57:57	critical	SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
09-12-2021 15:56:00	notice	CM-STATUS message sent. Event Type Code: 5; Chan ID: 33; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
09-12-2021 15:55:53	notice	REGISTRATION COMPLETE - Waiting for Operational status
09-12-2021 15:55:47	notice	DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
09-12-2021 15:55:10	critical	DHCP FAILED - Discover sent, no offer received;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
09-12-2021 15:54:54	critical	DHCP FAILED - Critical field invalid in response ;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
09-12-2021 15:54:53	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
09-12-2021 15:54:53	critical	DHCP FAILED - Discover sent, no offer received;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
09-12-2021 15:54:45	critical	DHCP FAILED - Critical field invalid in response ;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
09-12-2021 15:54:44	critical	DHCP FAILED - Discover sent, no offer received;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
09-12-2021 15:54:43	notice	TLV-11 - unrecognized OID;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
09-12-2021 15:54:40	warning	DHCP WARNING - Non-critical field invalid in response ;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
09-12-2021 15:54:40	critical	DHCP FAILED - Critical field invalid in response ;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
09-12-2021 15:54:40	critical	SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
09-12-2021 15:54:38	notice	Honoring MDD; IP provisioning mode = IPv4
09-12-2021 15:54:34	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
09-12-2021 15:54:25	critical	SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
09-12-2021 15:46:24	critical	Cable Modem Reboot from SNMP

[tdbegley28]

Just did a pin hole reset and out it back into modem mode.

Software and Hardware version remain the same as before but as least it can be monitored again from a fresh reset.

Hardware version : 1.1
Software version : LG-RDK_2.23.11-2106.14

[legacy1 · Accepted solution]

Maybe your Asus is doing speed tests for QoS

[tdbegley28]

Wow now I feel a bit silly.

You've just reminded me that on one of my nVidia Shield TV boxes I think I set up hourly speed tests a week ago to monitor the speed haha. Disabled them now so will keep an eye. Thank you so much!, If this does remove the spikes I will mark it as the Helpful Answer.

Thanks again.

[Kath_F]

Hi tdbegley28, 

Thanks for your post and apologies to hear you were having an issue with latency spikes. 

I'm glad to hear that with the help of the Community, you've been able to locate the source of the latency. 

If you continue to have issues after disabling the tests on your third party router, let us know. 

Thanks,