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[banger]

So I had a port swap this afternoon. But been told not to hammer the line testing or DLM might think it is line instability. OR think it is the router at fault but I have a VMG-1312-B10D coming on Wednesday to test. So I will do random tests to see if it is stable.

[j0hn]

PPP doesn't effect the DLM.
By testing they mean don't do anything that will break the DSL link.

A line has the same ES/CRC etc whether you are downloading or not.

If by "hammering the line" you mean doing large downloads then that will have no impact what so ever.

The fact this breaks your PPP session and not the DSL link points more at the ISP's hardware your session terminates on being at fault.

If the port swap fixes it though then great.

[banger]

Thanks John for your informed thoughts. I will do random tests to start off with then a couple of days hammering it when the new router arriveds. Reason I have gone for the B10D is it is on the OR MCT Approved list and has recent firmware. If it is the router I can get on to ZyXel. If it is TTB gateway falling over I will be onto Uno. No one else seems to have these probs.

[tiffy]

I have a VMG-1312-B10D coming on Wednesday to test. So I will do random tests to see if it is stable.

I have a VMG1312-B10D which I keep as an emergency spare, had occasion to put it into service a few days ago, modem/router mode, it performed really badly on my line, slightly lower synch than normal but with all error rates very high, took it off again after a few hours but it had already upset DLM causing a further re-synch & parameter changes the next morning.
Huawei DSLAM with a fairly long line, normally achieve 40 Mbps DS synch max..

By comparison to the VMG1312-B10A I wouldn't expect too much from the VMG1312-B10D with it's lower spec. BCM chip set and the lack of the on-board filter but who knows, every line is unique !

[banger]

Thanks Tiffy, I can test and monitor. OR via Uno have detected interference so are sending an SFI engineer.

Edit: Tiffy what sort of sync speeds were you seeing with the different routers?

[tiffy]

@banger:

This post from a few months ago regarding frequent, random PPP session drop outs on an Asus RT-AC68U I purchased from Amazon may be of interest or relevant to your current issue:
https://forum.kitz.co.uk/index.php/topic,24720.msg415781.html#msg415781

I eventually accepted that the unit was faulty and returned to Amazon for a full refund.
I was also using the Asus in bridge mode with a ZyXEL VMG1312-B10A as modem.

[tiffy]

Tiffy what sort of sync speeds were you seeing with the different routers?

With my VMG1312-B10A as modem I achieve very close to 40 Mbps DS synch and 5.6 Mbps US synch which is the max achievable for my line.
The VMG1312-B10D was 2 to 3 Mbps down on DS synch speed and with horrendous US/DS errror rates even with DS G.Inp active, my normal day to day ES rates are practically zero on the VMG1312-B10A.

[banger]

@banger:

This post from a few months ago regarding frequent, random PPP session drop outs on an Asus RT-AC68U I purchased from Amazon may be of interest or relevant to your current issue:
https://forum.kitz.co.uk/index.php/topic,24720.msg415781.html#msg415781

I eventually accepted that the unit was faulty and returned to Amazon for a full refund.
I was also using the Asus in bridge mode with a ZyXEL VMG1312-B10A as modem.

I'm using the 1312-B10A as a router as I find it snappier than the Asus. Thanks for the Sync info.

[banger]

SFI cancelled. Both OR and SP agree after port change there should be a noteable pause to monitor the line to see how it performs.

[tiffy]

Quote by tiffy:

I was also using the Asus in bridge mode with a ZyXEL VMG1312-B10A as modem.

Apologies, a rather obvious and unnecessary statement on my part, with the Asus RT-AC68U being a router only was using the only possible "2 box" modem/router permutation with the ZyXEL VMG1312-B10A combination.

Quote by banger:

I'm using the 1312-B10A as a router as I find it snappier than the Asus.

I take it you mean modem/router with the Asus RT-AC68U being a router only.

[banger]

Quote by tiffy:
Apologies, a rather obvious and unnecessary statement on my part, with the Asus RT-AC68U being a router only was using the only possible "2 box" modem/router permutation with the ZyXEL VMG1312-B10A combination.

Quote by banger:
I take it you mean modem/router with the Asus RT-AC68U being a router only.

Yes modem/router and the Asus as Access Point. Although it just fell over again with a PPP disconnect so have swapped out now to TP-Link WD9970 modem router to rule out ZyXel.

[banger]

There was an overnight drop under load with the ZyXEl so have swapped modem/router to a TP-Link WD9970 and monitoring with random downloads.

Edit: Although the TP Link is about 5 megs sync slower I haven't seen any ES on my line since I swapped it.

[banger]

PPP just dropped with the TP-Link on load, it has to be ISP termination/gateway router.

[PhilipD]

Hi

I was with UNO for years using various modems and the ZyXEL VMG1312-B10A, as a router and in modem only mode, and never had random PPP drops, but no longer with them so can't say if I would be seeing the same as you now.  However this was a thing at PlusNet many years ago when they put some of us on LLU, and turns out it was a configuration issue with their gateways and eventually it was fixed at their end.

Have you got a Thinkbroadband BQM set up, is there lots of packet loss or slow responses that could point to an issue with the line?  If that chart is all okay then interference on the line at the xDSL level isn't your issue, and most lines in the UK will likely test positive for some interference, its the nature of the beast.

So if sync remains stable, error rates are in normal range, BQM shows no packet loss or other issues, then the problem is most likely at UNOs side (or kit en-route) under the assumption you've swapped your kit and ruled it out. If it started recently then does that coincide with any configuration changes or firmware updates UNO made to their kit, of course you may not have that level of information or it could be changes made elsewhere on Openreach's kit.

If UNO have no other customers they can see with the same issue in their logs then I would think it must be some kit sat in between somewhere and likely other people are affected with other ISPs, unless you can all get together, as a lone person trying to get it resolved, it could be a long battle.  Swapping ISPs may resolve the issue, or it may continue, if it continues you will be starting again with a new ISP to get it resolved.  Good luck, let us know how it goes.

Regards

Phil

[meritez]

So I had a port swap this afternoon. But been told not to hammer the line testing or DLM might think it is line instability. OR think it is the router at fault but I have a VMG-1312-B10D coming on Wednesday to test. So I will do random tests to see if it is stable.

Can you confirm if it's a port swap on the same card or different card?