Set up Problems with Draytek 2750N

tezabeza

tezabeza

tezabeza

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Is there anyone on the forums that is using a Draytek VIGOR 2750N for there BT Infinity?

If so could you if possible let me know what setting you have so I can get mine working.

I have been on the Draytek site and the unit I have has the latest firmware and I have set the Multi-VLAN tot he settings on Draytek's support page for the router/VDSL Modem but my unit just sits there, trying to connect. It will not sysnc at all.

Any Ideas???
 
Hello.

I have been having a similar problem.

My exchange (Kesgrave) has just been converted to FTTC. The BT router and modem work fine, but I can't get the 2750 to work. Like you, I have followed the Draytek instructions, but without any joy.

Like you, I can't even get the VDSL to sync. It stays red, and the state cycles between Idle, Handshaking and Training. I do see the profile, though. It was 8c when this first started, but now shows 17a.

I raised this with Draytek support in November, but, as of yet, they haven't found a solution. They have replaced the router, but that hasn't cured it.

I would urge you to also raise this with Draytek support. The more people that raise it, the more information they have, and the more chance they have of finding what is causing it.

Mike.
 
Hello Mike,
From looking at the various forums, here, BT, AV Forums, Plusnet etc... there are quite a few of us that have the same problem.

What is the model of your BT Openreach Modem?? I ask because I have an ECI Telcoms modem so there is as far as I can see no unlock for this to actually see what the modem is doing and how its connecting to the FTTC DSLAM.

Would be handy because I think either the chipset in the modem is at fault or the codecs used in the firmware for the modem are not correct and have bugs that NEED to be resolved.

As I have put in another posting on here, the unit is IDEAL for what I am looking for, that is a all-in-one box replacement for the BT gear. Which dont get me wrong is OK but doesn't offer the GIG LAN or the Wireless N AP (I have a BT Business Hub). Wired is not an easy option as I have one PC in each of my son's bedroom's and a PC I use for Work and Radio Ham hobby in the workshop. so these 3 need to be wireless connected, and then I have a Laptop which is "N" enabled and then wired is a PS3, Xbox360 a BlueRay player and a PC in the room(HTPC) with a dual GIG LAN.

As for raising it with Draytek support I have raised 2 email with this problem so the do most defo know about it as do BBB where I got the unit from, they 2 have had quite a few returned and refunded for exactly the same problem.

Cheers Mike,

Tezabeza
 
Hello Tezabeza.

My BT modem is the Huawei HG612 2B.

I have seen, elsewhere, that it has the same modem chip as the 2750.

I have also seen the methods of unlocking it, but I don't really fancy trying that, as BT still own it. I don't expect to understand what I would find, anyway. From the little that I do know about VDSL, it is very complex.

Are your symptoms the same as mine? i.e. the status cycling between Idle, Handshaking and Training; the profile showing as 17a or 8c; the up and down speeds showing as n/a.

Also, are you on a recently VDSL upgraded exchange (i.e. within the last month or so).

Mike.
 
Mike,
My BT Modem is the ECI version looks the same as the Huawei but I would expect that this uses the same chipset. Yes reading about the forums the Draytek VDSL modems use the same chipset as the Huawei modems. But even so they should handshake and work if they all comply fully with the 8c/17a profiles BUT are BT using fully compliant profiles on the DSLAMS in the CABS??? Thats the problem are BT trying to make it as you can only use there kit doubt it but??

Regarding the symptoms YES exactly the same ALL data on the VDSL status page is either 0's or blank APART from the Firmware version and the profile which I have a 17a profile

And the DSL light just keeps flashing fast at first (handshaking) then slower training.

As regards the date the local exchange went live that was September of last year BUT our CABS in the village didn't go live until 15th December. But there have been problems with this unit since coming on the market if you look at the forums and the dates posts were put on there.

If I get NO JOY from Draytek next week after sending the SYS Log i have from the unit I think I will try a Billion 8200N has the Wirless N I am looking for but just not GIG LAN but I can live with that for now just buy a GIG LAN switch as an when I need it. As I have said BBB have been great and offered a replacement of the unit or a different product and I can pay the difference or get a refund if I get a cheaper product.

Cheers, Tez
 
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Draytek 2750

I also purchased a Draytek 2750.

Works fine apart from I can't get upload speed that I had with O/R modem. Could tweak the packet shaping to improve ping and get the download speed somewhere near but upload was about half

Looking at an unlocked HG612, it uses 802.1P. There is no feature for this on the Draytek. I believe this has something to do with priority on the upstream - it's set on the HG612 as a value of 2.

I have emailed support to ask them if this feature is available - no response yet.

The chipset for the Draytek and the HG612 are the same Broadcom 6388, but obviously the firmware is different.

Now looking at P-870HN-51b Zyxel but nowhere in stock.

It's a shame because the Draytek is a good product and is now residing as a WLAN acces point / Gig switch
 
My problem is now with Draytek in Taiwan, and they are treating it seriously. They want to sort it out. Unfortunately, because of Chinese New Year, they are away all next week.

At the moment, I am trying to sort out a way for them to access my router remotely, without using my own VDSL connection, so that they can diagnose the problem.

Things are looking up.

Mike.
 
mad_zoidberg said:
I also purchased a Draytek 2750.

Works fine apart from I can't get upload speed that I had with O/R modem. Could tweak the packet shaping to improve ping and get the download speed somewhere near but upload was about half

Looking at an unlocked HG612, it uses 802.1P. There is no feature for this on the Draytek. I believe this has something to do with priority on the upstream - it's set on the HG612 as a value of 2.

I have emailed support to ask them if this feature is available - no response yet.

The chipset for the Draytek and the HG612 are the same Broadcom 6388, but obviously the firmware is different.

Now looking at P-870HN-51b Zyxel but nowhere in stock.

It's a shame because the Draytek is a good product and is now residing as a WLAN acces point / Gig switch
Click to expand...
Like you, I have a reduced upload speed with the Draytek. My download speeds are great, speedtest.net still reporting 38 Mbps as it has always beem, but download has slipped from ~8Mbps to ~6Mbps.

Not a major drama for me, but I would like to get it sorted.
 
It's a steep learning curve on VDSL!

Back to the HG612 at the moment with resonable speeds and 6Mb upload.

I bought the 2750N so I could tweak the performance up, all it seems to do is come down.

I don't know if it's an actual issue in the modem but my stats on the u/s 2 snr are zero although d/s 2 has a figure.

I've been posting on the BT Community board to no avail - someone suggested I wasn't getting the frequency band and it was a factor of my line length. However, if I'm getting this on the HG612, it must be the 2750.

Interstingly, the sync speed on the HG612 is about 37 / 38 Mb, the modem's saying about 34 / 35 achievable but getting about 30 on speedtester.
 
I have been helping Draytek to solve this problem, giving them remote access to my router, via my neighbour's wireless connection (with his permission).

I've just learnt something relevant to this problem.

I understand that a lot of 2750s have a Broadcom chipset, for the VDSL. I don't. Mine is a Metanoia Merlin! That could explain why some people have working 2750s on BT Infinity, and some do not. I suspect that the newer 2750s use the Metanoia chipset. I expect that Draytek had a good reason for changing from the Broadcom.

Have a look at the Australian Draytek website, to see what chipsets are in each router - http://support.draytek.net.au/index.php?/Knowledgebase/Article/View/310/15/what-chipsets-are-used-in...

If you have one of the Beta firmwares, it shows what chipset you have, on the Online Status page, under VDSL Information. It calls it Server.

We have another debugging session booked for Monday morning. I'll keep you informed of any progress.

Mike.
 
Nice one Mike, shame it didn't come in time for me.

Supplier kindly supplied a second unit to try but to no avail so I changed that out for a Billion 7800n.

Stuck with the Open Reach Modem, and had the Billion up and running in about 20 mins. Had a small problem at first trying to get the unit to connect with the internet. I set it up same as the Draytek with the VLAN enabled and set to 101. BUT it turns out that I don't need the VLAN enabled turned it off and was connected and running smoothly in about 30 seconds after wards!!!

OK on the different chipsets Mike as well this could really be the major problem that is the route of all the problems with this product and like you say the reason why some people have working units and other don't.

Such a shame really as it is a good product for the new VDSL market and I hope Draytek sort the problem as I may look at it again in a few years time when all the problems have been ironed out.

For now I will stick with the Open Reach Modem and my Billion 7800n

Cheers Mike and good luck.
 
There is progress with the new Draytek 2750 with the Metanoia chip on Infinity.

The clever modem men in Taiwan managed to get my VDSL2 link up, using their debug tools. That means that they know what the problem is. At the moment, I will loose their modifications if the router reboots, but I am hoping for some new firmware next week.

I'll report any further progress.

Mike.
 
Interesting info Mike, I'm curious to know whether anyone is having similar problems with the 2850N?

Just about to order one in a few days to replace a 2750N I killed.
 
nice mike. i think i must be on the broadcom draytek chipset since i can connect fine. I am however having problems with theupload not being as fast as the open reach modem. hopefully they can fix that.

noticed that some people here and on the draytek forums are also having issues.

I am having one further problem. Every 2 days my draytek will lose connection and reconnect to the internet, meaning i get rougly 20 secs of downtown. Not normally a problem but i have had it occur during a livestream and during a mw3 clan match which was not good!

Anyway i noticed that when the draytek initially connected i was getting a SNR downstream of 116 (11.6) and an SNR upstream of say 65 (6.5). I did some reading and it seems that this upstream snr is pretty low already. Anyways, i checked over the course of 24 hours on the draytek online status page and it steadily drops until it reaches 0. Within the next few hours it will then do the disconnect and reconnect.

I am synching at 39985/9999 if that helps. At a loss here. Before i moved over to the 17a profile i was rock solid.

I am pretty sure that engineer said that my line was aluminium. Could that be affecting my upstream stability or is it the draytek router. I havent really used the OR modem/HH3 at all since getting infinity so i am not sure if its stable on that setup.

If anyone has any ideas, please let me know.
 
Mana, I had similar issue with my 2750N, & my line was aluminum, it was replaced by a copper one, problem solved.

BT engineer show me a section of the cable, the aluminum was badly corroded & fell a part into dust on bending.

He put the fault down to vibration of the traffic was just enough to make & break the connection in the cabinet.
 
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Nightglow said:
Interesting info Mike, I'm curious to know whether anyone is having similar problems with the 2850N?

Just about to order one in a few days to replace a 2750N I killed.
Click to expand...

My 2850n works great in every sense EXCEPT as a VDSL2 modem. If I connect to my ADSL line all is sweetness and light, albeit at a slower rate. If I connect to the BT supplied ECI box (VDSL2 on my other broadband line) using the EWAN PPPoE port then again it all works fine. If I unplug the BT ECI modem and plug the 2850n in to the phone line instead it just cycles continously between IDLE, TRAINING etc and never connects. I've made all the relevant settings and spent plenty of time communicating with Draytek support in the UK and sent them a number of logs. I've even got a replacement unit but still no dice.

I have concluded that it is a firmware fault as 2850n units with Broadcom chipsets apparently work whereas Metanoia chipset varieties don't. I'm relieved to hear that another forum member with a Metanoia chipset version has had direct Draytek, Taiwan, support which has resulted in a working unit albeit only until a reboot. I hope that a beta version which works will be released very soon.

The 2850n unit is the only unit around (not counting CISCO kit) that ticks all the boxes for me as I need IPSEC tunnel support. If this wasn't the case I'd be looking elsewhere. On the plus side I really like the unit in terms of config so I'm going to stick with it for the moment. I can at least continue evaluating it using the EWAN connection to the BT box. There's no way I can recommend or supply it to customers in this state however.

Cliff
 
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I had a mare getting my 2850n to work on Infinity.

Once set up and connected I then had issues that I couldnt access iPlayer through the BT Vision Box and then on a reboot of the BTV it wouldn't get past the HH3 authentication - Draytek have emailed me the latest Beta Firmware

System Status
Model Name : Vigor2850n
Firmware Version : beta_0414
Build Date/Time : Feb 10 2012 20:19:14

Which didn't help, but have now changed the DNS server IP addresses and (fingers crossed) all appears to work, although I seem to be getting slightly lower up and down speeds :S
 
~TB~ said:
I had a mare getting my 2850n to work on Infinity.

Once set up and connected I then had issues that I couldnt access iPlayer through the BT Vision Box and then on a reboot of the BTV it wouldn't get past the HH3 authentication - Draytek have emailed me the latest Beta Firmware

System Status
Model Name : Vigor2850n
Firmware Version : beta_0414
Build Date/Time : Feb 10 2012 20:19:14

Which didn't help, but have now changed the DNS server IP addresses and (fingers crossed) all appears to work, although I seem to be getting slightly lower up and down speeds :S
Click to expand...

That's very interesting. They emailed me two versions of beta firmware including the 0414 version and neither made any difference. For what it's worth my DNS entries are set one to my local linux server (it also serves as DHCP server etc) and the second to a remote company DNS server. I've never had any trouble with any of the web sites so far using the EWAN port. Selective website troubles are often due to MTU issues.

On another note has anyone tried the config backup and restore on the 2850? When I did it always failed to restore, not very useful after I had typed in a couple of dozen MAC addresses as part of the wireless security we use.

Cliff
 
Im using Google public DNS

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Not tried restoring a config back up yet ...........
 
Nightglow said:
Mana, I had similar issue with my 2750N, & my line was aluminum, it was replaced by a copper one, problem solved.

BT engineer show me a section of the cable, the aluminum was badly corroded & fell a part into dust on bending.

He put the fault down to vibration of the traffic was just enough to make & break the connection in the cabinet.
Click to expand...

ow right, thanks for that nightglow. how did you go about requesting the aluminium to be replaced. did you have to go through bt india?
 
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