Dear all, having spent almost an entire day i have finally got the vigor 2850 working with sky fibre on WAN1 using built in VDSL modem.

So to help out anyone else who wants to do this this is what i did.

First of all get the following firmware:

Model Name : Vigor2850n
Firmware Version : 3.6.3_RC1
Build Date/Time : Jul 13 2013 03:54:59

Draytek telephone support have this logged on their system as T809331 - TXT DNS Lookup firmware T809331 , i can email it to you if you private message me.

After flashing the firmware the next thing to do, is to follow the instructions on this page http://www.skyuser.co.uk/forum/extracting-sky-router-passwords/51163-how-get-username-password-sky-hub-sr101.html

Another step by step guide is

http://routerconfig.me/legacy/sky/Obtain%20you%20Sky%20username%20and%20password%20from%20your%20FTTC%20enabled%20router%20v2.pdf

to get not only the sky username/password but also the serial number information as well

they should look something like this:

macaddress@skydsl|password

1.15h.2138.R|001|SR101|serial_number

record all this information for use Telneting into the draytek 2850 later

So after getting the right firmware and the sky router username/password and firmware/serial number details the next thing to do is log into 2850

WAN - general setup and set the VLAN tag insertion to enable for VDSL with a TAG value of 101

Next on Wan - Internet access on WAN 1 set the following:

MPoA / Static or dynamic IP - enabled

Multi-PVC channel - Channel 2
Encapsulation - 1483 bridged IP LLC
VPI - 0
VCI - 101
Modulation - multimode
WAN Connection Detection - mode - ARP detect
MTU 1442
Obtain an IP address automatically - ticked
router name - whatever you want - Vigor by default
DHCP Client Identifier for some ISP - enabled with the username you extracted earlier from sky router in format: macaddress@skydsl and the password which is normally 8 numbers
I also spoofed the MAC address by Specifying the MAC Address which is the MAC address used in the username and also the same as the on the label on the back of the sky box.

ok once you have done all this, like mine sky will probably still not be working
So now you have to telnet into the draytek to put the extra information into the DHCP options - this is the trick to getting it all working,

open a command in windows and then type
telnet 192.168.0.1(or whatever the LAN IP address is of your draytek)
log in with the same username and password as you would with the web interface

Ok this is the important part where you need to use the extracted information from the sky box.

Type this exactly substituting the extracted information:

ip dhcp option -e 1 -w 1 -c 60 -v "1.15h.2138.R|001|SR101|serial_number"

and then

ip dhcp option -e 1 -w 1 -c 61 -v "macaddress@skydsl|password"

to check that this has been saved to the draytek type:

ip dhcp option -l

and this should list the 2 new entries you have added.

What this has done is forced the draytek to send the information to sky on DHCP options 60 and 61 with the username/password and firmware/serial number along with the MAC address.

This is the part that took me ages to work out.

Hopefully now you should have a fully working draytek 2850 with Sky. Any questions give me a shout.

important points i couldn't get it working with 3.6.4 because it outputs the DHCP option 60 username/password incorrectly. and nothing will work without the telnet commands.

Even have not sky we appreciate your work which will help others ... weldone

If you could send me the software upgrade that would be great
Thanks Neale

I thought i would share the file with anyone who needs it, easier than sending it to people 1 at a time.

http://rapidshare.com/files/3150640345/T809331%20-%20TXT%20DNS%20Lookup%20firmware.zip

thanks

Can I just say a HUGE thanks to you Karkan. I followed your guide but used firmware version 3.6.6 from here ftp://ftp.draytek.pl/Seria_2850/Firmware/ and it worked perfectly. I can finally start using the 2850n I bought 18 months ago