Lost MDD Timeout

[peteblanchard]

Hi - having intermittant drop outs with a wired connection - happens every few days for 15-30 mins.  Any suggestions?  Log shows:

29/06/2021 11:10:31	critical	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
29/06/2021 11:09:25	notice	LAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
29/06/2021 11:08:33	Warning!	Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
29/06/2021 11:08:33	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
29/06/2021 11:08:32	Warning!	Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

[lotharmat]

Lost MDD Timeout; Refers to loss of system messaging between hub and CMTS, despite how that sounds, MDD timeouts are usually of no significance to the user, but sometimes crops up with the other moder serious errors.

(from https://community.virginmedia.com/t5/Gaming-Support/Can-someone-help-me-with-these-errror-messages-p...)

Can you post up the rest of the Hub stats (up and downstream - See if we can see what may be going on!

[peteblanchard]

Thanks - here's the full log:

29/06/2021 11:50:40	notice	LAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
29/06/2021 11:33:16	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
29/06/2021 11:12:33	notice	LAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
29/06/2021 11:10:31	critical	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
29/06/2021 11:09:25	notice	LAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
29/06/2021 11:08:33	Warning!	Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
29/06/2021 11:08:33	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
29/06/2021 11:08:32	Warning!	Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
27/06/2021 13:32:36	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
27/06/2021 00:59:33	notice	DHCP Renew - lease parameters tftp file-cmreg-vmdg505-bbt057+voc-b.cm modified;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
27/06/2021 00:59:33	Error	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
23/06/2021 19:41:11	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
23/06/2021 12:59:33	notice	DHCP Renew - lease parameters tftp file-cmreg-vmdg505-bbt057+voc-b.cm modified;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
23/06/2021 12:59:33	Error	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
20/06/2021 05:23:24	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
20/06/2021 00:59:33	notice	DHCP Renew - lease parameters tftp file-cmreg-vmdg505-bbt057+voc-b.cm modified;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
20/06/2021 00:59:33	Error	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
18/06/2021 11:08:26	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
17/06/2021 08:40:47	notice	LAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
17/06/2021 01:15:9	notice	DHCP Renew - lease parameters tftp file-cmreg-vmdg505-bbt057+voc-b.cm modified;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

Downstream bonded channels

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

1	386750000	2.2	38	256 qam	32
2	202750000	2.2	37	256 qam	9
3	210750000	2	37	256 qam	10
4	218750000	1.9	37	256 qam	11
5	226750000	1.7	37	256 qam	12
6	234750000	1.7	37	256 qam	13
7	242750000	1.7	37	256 qam	14
8	250750000	1.2	37	256 qam	15
9	258750000	0.7	37	256 qam	16
10	266750000	0.2	37	256 qam	17
11	274750000	1	37	256 qam	18
12	282750000	2.5	38	256 qam	19
13	290750000	2.7	38	256 qam	20
14	298750000	2.9	38	256 qam	21
15	306750000	2.7	38	256 qam	22
16	314750000	3	38	256 qam	23
17	322750000	3	38	256 qam	24
18	330750000	2.9	38	256 qam	25
19	338750000	3	38	256 qam	26
20	346750000	2.7	38	256 qam	27
21	354750000	2.7	38	256 qam	28
22	362750000	2.7	38	256 qam	29
23	370750000	2.7	38	256 qam	30
24	378750000	2.7	38	256 qam	31

Downstream bonded channels

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

1	Locked	38.9	14	0
2	Locked	37.6	8	0
3	Locked	37.6	8	0
4	Locked	37.6	10	0
5	Locked	37.6	8	0
6	Locked	37.6	8	0
7	Locked	37.6	8	0
8	Locked	37.3	9	0
9	Locked	37.6	15	0
10	Locked	38.6	10	0
11	Locked	37.6	3	0
12	Locked	37.6	5	0
13	Locked	38.9	5	0
14	Locked	37.6	7	0
15	Locked	38.9	6	0
16	Locked	38.6	10	0
17	Locked	38.9	23	0
18	Locked	38.6	22	0
19	Locked	38.6	22	0
20	Locked	38.6	23	0
21	Locked	38.9	19	0
22	Locked	38.6	7	0
23	Locked	38.9	7	0
24	Locked	38.9	7	0

[peteblanchard]

Upstream bonded channels

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

1	39399979	41.7	5120	64 qam	12
2	32600000	41.8	5120	64 qam	13
3	46200002	41.8	5120	64 qam	11
4	53699942	41.8	5120	64 qam	10

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

[lotharmat · Accepted solution]

Hmmmm - the actual stats look fine from where I'm sitting.

Hang tight for VM Staff to look into it!

In the meantime:

Also, set up a 'Broadband Quality Monitor'. This will monitor the state of your connection and record any network dropouts etc - You can do this at ThinkBroadband (https://www.thinkbroadband.com/broadband/monitoring/quality)
Give it a while to gather data and then click 'Share Live graph' and paste the 'Direct Link' into the forum!

[Akua_A]

Hi @peteblanchard,

Welcome to our community forums and thank you for your first posts. 

Sorry to hear you have been experiencing intermittent broadband service. We can understand the inconvenience this may have caused you and we want to do our best to help.

I have been able to access your account using forum details. There is currently a planned outage that may be affecting your service. Our engineers are aware of this and are working to resolve this as soon as possible. The estimated fix time is  01 JUL 2021 15:00.

Please let us know if the issues persist and if you need any further help.

Thanks,