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Tom_Raymond
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MDD Timeout (slow connection / disconnects)

 


I'm having an issue with my network connectivity similar to that which was reported in this other users post: https://community.virginmedia.com/t5/QuickStart-set-up-and/Lost-MDD-Timeout/td-p/3550627

I have been having intermittent disconnects and slowdown for the past month which seem to be increasing in frequency. For several hours last night as well as the past hour since I got home today my connection speed had dropped to the point of being unusable for my purposes (0.89Mbps down, 10.9Mbps up):ConnectionSpeed.PNG

No one else was using my broadband during this period, the only connected devices being my iPhone, my desktop PC (wired, this is the device is tested with) and my chromecast (TV was off). My routers logs show the following warnings:

02/07/2019 17:03:53 Warning! Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
02/07/2019 17:03:56 Warning! RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
02/07/2019 17:03:57 Warning! Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
02/07/2019 17:04:0 Warning! RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
02/07/2019 17:04:1 Warning! Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
02/07/2019 17:04:2 Warning! RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
02/07/2019 17:04:11 Warning! Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
02/07/2019 17:04:11 Warning! RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
02/07/2019 17:04:18 Warning! Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
02/07/2019 17:04:18 Warning! RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
02/07/2019 17:04:20 Warning! Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
02/07/2019 17:04:20 Warning! RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
02/07/2019 17:04:41 Warning! Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
02/07/2019 17:04:43 Warning! RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
02/07/2019 17:04:49 Warning! Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
02/07/2019 17:04:51 Warning! RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
02/07/2019 17:05:11 Warning! Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
02/07/2019 17:05:13 Warning! RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
02/07/2019 17:05:21 Warning! Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
02/07/2019 17:05:21 Warning! RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

...While writing this my connection speed has shot back up over 40Mbps again, which while not close to the advertised 100Mbps is usable.
It was advised that for me to setup external monitoring of me connection by a friend. See below my connection status for the past 24 hours:
connection issues.PNG

If there is anything I can setup to help gather more information regarding this intermittent issue or anyone has suggestions it would be most appreciated.

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Roger_Gooner
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Re: MDD Timeout (slow connection / disconnects)

Your logs show repeated connection dropouts. Power off your hub and check that all cable connections between the hub and wall termination box are tight. Power the hub back on, put it into modem mode on and check your speeds with speedtest.net. Post your download and upload stats.

--
Hub 3.0, TP-Link Archer C8, TP-Link TL-SG1008D 8-port gigabit switch, V6
My Broadband Ping - Roger's VM Broadband Connection
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Tom_Raymond
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Re: MDD Timeout (slow connection / disconnects)

Hi Roger,

Thanks for the advise, speed stopped being an issue after my original post, it just went back to intermittently dropping out on me.
I checked all my cabling when the issue was first occurring (cables screwed in place can't really come loose) but will do so again tonight and see if it makes any difference.

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