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Other broadband queries

High FEC Corrections and CRC errors on upstream

5: Helper

Well no simple answer for you but if you've followed all the FAQ troubleshooting then I'd report to VF as you say your link was working well.

 

We all seem to have similar but different iterations of a problem which may be router/firmware related - You don't give any figures for FEC or CRC errors or mention your PPP uptime, my PPP link now has approx 9 days uptime and Upstream FEC's clock at about 130000 every 3 seconds but CRC's and Downstream FEC's are quite low.

 

As your link speed (especially upload) is being adversley affected then VF Tech Support should be contacted

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4: Newbie

Well last night we had no connection at all, which was really odd because router lights were green and PP was up but there was no WiFi, connectivity test failed. Router log said connection to ACS failed. Thought oh well new router tomorrow, all will be ok......

Router arrived today.....yep you guessed it it is still disconnecting from WAN, within a minute 1.5 million FEC upload corrections and 30 thousand download and no WiFi connectivity, ACS connection failed. At a loss now. Tech 2 phoning me at half 6 to discuss what’s going on.

Moderator
Moderator

@Starling2015 I'm really disappointed to hear we still haven't managed to pin point the problem, please let us know what the Tech team advise when they've been in touch later. 

 

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5: Helper

Well that's fairly clear that the router is not talking to the ACS so doesn't have the necessary info to allow it to access the WWW, had this myself when I first connected & they reckoned somebody had provisioned my link incorrectly, they did something on their kit, it still didn't connect immediately and although they didn't tell me I needed to do a reboot of the router & it came up 

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5: Helper

@Starling2015  Don't tell me you're still not sorted ?

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4: Newbie

Well I thought it was going ok, a few disconnections yesterday but today we are back to the router disconnecting from WAN all the time 🙈 😫

 

current router stats attached, PP been up for an hour and 20 minutes so far 

4: Newbie

And it’s gone off again! Oh dear, I have no idea what the problem could be.

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5: Helper

 All you can do is give Tech Support grief, I still have the original Upstream FEC problem which I've been reading up on but until you get the PPP stable .......................... my PPP's been up for 11days7hrs. there's also loads of discussion on 3rd Party routers for various ISP's but the crunch seems to come back to the poor user as there is no definitive list of what is approved (has MCT approval) or what works well so I wouldn't even consider that option until you get a Vodafone router stable on your link. Hope you have some good news soon.

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4: Newbie

11 days! Wow, perhaps your router is handling the errors well, but with so many errors we need to know what it is that causes them at least. How are your router speeds out of interest? Because the router is continually disconnecting we are back on interleaved path. 

 

I woulfnt even mind of it just disconnected during the day and we had a stable connection in the evening, lol not that I should have to compromise on a stable connection. 

 

Must say though once getting through to support on phone they have been great. I missed a call from them yesterday to check how the connection was and he said he would phone back Monday. I now know to just avoid the online chat! 

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5: Helper

Speed is still 39.994 & 9.999 (only paying for 38Mbps service), Interleaved, Downstream errors CRC 457, FEC 3202, Upstream CRC 3188, FEC 3.8billion & counting, rollsover to Zero every 9 or 10 hours. So as that's for 11days the only bit that's worrying is the Upstream FEC's, also I notice major slowdown at peak times.

 

Of course if you can't get to sleep try reading BT SIN 498 or G.INP retransmission then a few errors pale into obscurity.

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4: Newbie

😂 I won’t lie I just googled that! I think I may just be ok sleeping....I wouldn’t want to be telling support how to fix the issue 🙈😉

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4: Newbie

Hmmm - so last disconnect was 6 hours ago according to log....and it seems to be stable with the lowered upload speed set at 5. Download speed has dropped below guaranteed speed again. Perhaps my line just becomes unstable with the higher speeds?  

 

The FEC corrections have dramatically lowered and no CRC errors.

5: Helper

Good morning - Take care SNR & SNR Margin are another litany of words you'd rather not want to read, I'm glad you have some stability.

My understanding, which may be corrected by someone with a greater knowledge then I, is that FTTC (Fibre To The Cabinet) is at High Speed and then a DSLAM (Digital Subscriber Line Access Multiplexer) via the DSL (Digital Subscriber Line) to the VDSL2 (Very high-speed Digital Subscriber Line) modem/router is how the link is provided and the link speed of this depends on 2 main criteria. 1: the service you're paying for & 2: the line attenuation & noise.

So logic says provided you're the only person on the cabinet with the problem you have 4 main variables :- 1, The DSLAM, 2: The line serving your property, 3: Your property, 4: The Modem/router.

You mentioned previously you've had BT (OR) out & they say the line is clear (did they also test the DSLAM ie do a test which proved the connection through the DSLAM and all the way to the local exchange), the modem/router has been changed, so that leaves any internal wiring/influences - where is you master socket, have you connected to it & are you sure all internal wiring is disconnected, are you sure you've not got any local sources of interference, more controversial (because router side should not affect modem side) - turn off the wifi (Wifi, General, Wifi Network slide to off) and connect a laptop (running on battery only) to the ethernet ports and if you've still got issues are you techie enough to connect a 12 volt battery supply to the router rather than the mains. Is this your first time you've had a Fibre service ? Btw for safety please remember do not attempt anything outside of your comfort zone.

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4: Newbie

Hmm I don’t think I am techie enough to try the 12v battery....

 

Open reach engineer whilst was here checked some wires in a grey box outside our property, he also went back to the green cabinet just up the road. He also checked the plug socket that router was plugged into as it’s next to the master socket.  When he previously came he changed the faceplate for us to an MK4 and disconnected the extension wiring..we don’t actually use a home phone at all. He then proceeded to tell me he was checking for something called ‘Rein’ and again that came back clear which led to him suspecting router, however obviously we are still getting problems with the disconnections. He did say though that he wasn’t a broadband engineer........

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4: Newbie

So we managed 14 hours without it disconnecting! PP been up and running 20 mins now but FEC corrections back into the millions, both download and upload speed dropped slightly.

5: Helper

Ah, REIN & SHINE, I like this article on those 2 terms, it's in English  https://support.zen.co.uk/kb/Knowledgebase/Broadband-Understanding-REIN-and-SHINE , so the suggestion is that he's checked for impulse noise being picked up by the cabling, There's also an interesting test with a radio you could try.

Are VF Tech Support still investigating the problem, if not report it again.

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Highlighted
4: Newbie

Thank you, i’ll have a read. I’ve been assigned someone called Andy from the directors office, he’s not back in until Monday but left me a voicemail on Friday evening to say he would give me a call Monday and hopefully I will update him with positive news. Poor man 😂

and there we go its gone off again 👏🏻

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5: Helper

Update on FEC counters

 

Looks like the max number before it clocks over the top (so back to zero) is 4,299,999,999 can't be 100% certain as I've been clocking errors in blocks of around 130,000 but it was just below that & then couple of seconds later was approx 50,000 and again clocking 130,000 every 3 seconds. All other counters have not altered when the Upstream FEC counter went over the top.

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2: Seeker

I'm guessing the counter rolls over at 2^32 = 4,294,967,296, not that its important.

What is important is not to puit up with a shoddy service - if they can't fix it, vote with your feet... and go elsewhere until such time as VF can provide the service they advertise and ask us to pay for ...

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4: Newbie

13 hours without a disconnection now but just look at those errors!