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[srt]

I posted a query in hardware thread earlier and I shall try to clarify whats giving me grief.
On January 26th I needed to turn power off in house.
On switching back on the bt modem (white thing) refused to connect,ADSL light flashing etc.
tried all the usual palava and then phoned bt
They asked me to do all the same palava and following them calling me back after testing said I would need an engineer visit.
The next day late afternoon I noticed that the modem was now showing connection which it has since but with the LAN light going off at various times and dropping the router etc.
I decided not to call bt though and waited the three days it took for engineer visit twixt 8.00 and 1.00.
Well they never showed and I sent a complaint off as my system was in the infernal DLM and is never going to get better whilst this LAN keeps dropping
Ive managed to alert bt via their forum and I beleive one of their mods is looking into matters.
My fault message on bt page says the fault is "resolved"!
My download has dropped from a reasonable 46gb to 20gb.
My router is a bt business one that ive mentioned in a hardware thread and its the one I got when I just had a non fibre problem involving REIN way back before fibre. I used it with routerstats but its not so simple with fibre. Anyway, can anyone give me a clue as to the possible cause of this LAN drop which seems to occur in the modem and knocks the router off and back on again?
Sorry for the length of this

[burakkucat]

It is not entirely clear as to where your problem may reside. 

You mention "with the LAN light going off at various times and dropping the router etc." Are you referring to the LAN1 LED on the Openreach modem (the "white thing")? If yes, then that is signifying a problem with either the router (the 2Wire 2701HGV-C) or the cable connecting router to the modem.

. . . my system was in the infernal DLM and is never going to get better whilst this LAN keeps dropping

That can not be correct. The DLM operates on the circuit between the cabinet based MSAN and the modem, not between the modem and the router!

A drop of downstream throughput from 46 Gbps to 20 Gbps is certainly significant and could imply a similar drop in downstream synchronisation speed. You really need to check your modem's synchronisation speed (if you have an unlocked Huawei HG612 modem). Failing that, the BT Wholesale Performance Test may show up some anomaly.

Anyway, can anyone give me a clue as to the possible cause of this LAN drop which seems to occur in the modem and knocks the router off and back on again?

As I have explained above, you seem to have a wrong understanding of the situation. It appears that the router is dropping the connection and that status is shown by the LAN1 LED on the modem being extinguished.

[srt]

Hi burakkucat,
Thanks for the pointers.Thanks for the polite words about wrong understanding
I would say I have it Bass Ackward
Unfortunately the Huawei HG612 modem is not unlocked and maybe thats to the good for now as Ive a further bt engineer visit scheduled for next Monday pm.
I just performed the test you kindly linked to and got : Download speed Mbps 16.26. Upload speed Mbps 9.54. Ping latency ms 49.75
Which is not good

[waltergmw]

Hi srt,

The fact that even the BT checker has painted a red worm indicates even they think "summat's up".
I think you'll find that many visitors turn a blind eye to an ethernet cable in port 2 of the modem.

Kind regards,
Walter

[burakkucat]

I just performed the test you kindly linked to and got : Download speed Mbps 16.26. Upload speed Mbps 9.54. Ping latency ms 49.75
Which is not good

Agreed. It most certainly is not good. 

Perhaps it might be worthwhile repeating the test, save a screen-shot and then go on to the further tests that it invites you to perform. The results so gathered may assist the engineer in understanding the problem, when s/he visits.

[srt]

Repeated test but its not playing ball now!
I also noticed the disconnect again today at around a similar time - that is to say the router displays all lights off (except power) and the modem loses LAN1, then router picks up again as does the modem.
The ADSL light on modem stays solid though so this is router related?
I hope the timing of the loss around 15.00 hrs is nothing to do with REIN or something like.
Ive been there before

[burakkucat]

. . . the router displays all lights off (except power) and the modem loses LAN1, then router picks up again as does the modem.
The ADSL light on modem stays solid though so this is router related?

From the above, it is easier to say that your issue is not line nor modem related. With the DSL LED of the modem constantly illuminated, that reinforces the suggestion that the problem is probably router based.

[srt]

[ the problem is probably router based.]

Hmm - that might have a bearing on my other question on the hardware thread - in that the first use date had mysteriously changed to the day after I lost internet (DSL on modem) and my password would not work.
I still have my original HH3 that BT sent me so maybe its worth trying or perhaps just wait till Monday and the engineer call

[burakkucat]

Something to consider . . .

Power down the router (the 2Wire 2701HGV-C), disconnect it from the modem, power it up and then perform a factory reset. When complete, leave it disconnected from the modem, enter its GUI based configuration (via the IP address 192.168.1.254), set your password and configure the device, as appropriate.

Once all has been set and the configuration has been saved, power it down once again, reconnect it to the modem and then power it up.

[door_bell]

Use a PC and no router to test??

Rules out router fault......

[srt]

Sorry not to have replied earler but I had busy few days.
Thanks "waltergmw" - I suspect the bit about port 2 is to do with unlocking?
"door_bell" - Not sure I understood that
"burakkucat" - Thanks for the pointers. I decided to await the second engineer visit arranged for today - - sadly they never showed - AGAIN
Not best pleased with bt at the mo and I await there reply to my email to the guy who is "assisting"

[srt]

Well just to keep updated on things here
I decided to just swap out the router for the home hub 3 and it appeared to be ok. BT chap said to let him know if anything happens and he will call me on Monday.
The missed engineer visits remain unexplained but I am to get a little refund on my account for the trouble
I just checked the connection time on the hh3 and its just showing six hours. Sadly I havent unlocked anything so thats the limit of my monitoring ability
I wonder if this could be the signs of the dreaded REIN that I had ages back in 2011
I have advised BT chap of this dropped connect and hope he can check it out.

[srt]

Apparently I need another engineer visit - - - - lets hope its a real one this time

[burakkucat]

Thank you for keeping this thread updated.

From what you have explained, I am quite certain that you problem is not REIN related. 

[srt]

Things get curiouser and curiouser.
Around 4.00pm I was online and the ethernet connection was lost but the HH3 still displayed blue lights. Wifi still worked and I had an ipad running ok.
I rebooted my pc and the connection was established.
Then a minute or two later the HH3 broadband light goes orange and the screen help pops up showing error and to try blah blah to reconnect but nothing was happening. The wifi had also gone off and the modem LAN1 light is blinking
I powered HH3 off and then back and its connected again.
I am not sure Ive explained that too well but I am now wondering about the pc ethernet
Mind you, the lost connection that occurred in the night did not occur when the pc was running
I await bt to get back with engineer visit day/time