I didnt know you could connect 2 Routers together ! An ADSL and DSL !

Soldato
Joined
10 May 2004
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3,480
Location
South UK
Ok, as some of you may be aware I have been trying to rig up an ADSL Modem (a Draytek Vigor 120) to a new Router that has the DD-WRT firmware on it, a Linksys E1000.

Ive got Sky ADSL Broadband and after much digging and faffing around to get a non-Sky Modem/Router to connect to the sky internet connection I discovered, you cant.

Well, actually you can but your connection speed is massively reduced. It seems Sky use MER (Mac Encapsulated Routing) on many of their networks. It seems that my local exchange is an MER one. As far as I can tell (from googling quite a lot) is when you dial into Sky, its on a PPPoA protocol, after that it will change to an MER protocol IF your router is accepted by its MAC address. This is where the problem lies, my non Sky Modem would connect to Sky and I could use the internet but it remains at a lower speed as the modem could not authenticate with MER and hence I cannnot get the better speed. Its a big difference too, the modem was getting 4mb, the sky router was getting 11mb. Massive difference. Sky have been very sneeky and clever to stop people using their own routers instead of the issued one.

In doing my digging about I did find some very weird things which I think are how Sky intended in order to stop this sort of thing. My WAN (not LAN) MAC address changed each time I connected and reconnected the router to the phone line. It would also sync to a different server with a different IP address. In other words it seems impossible (in my area anyway) to connect to Sky with a different router as I dont know what the MAC will change to when I manually input it in the ADSL modem.

Anyway, I have wasted my dosh on the modem but that will end up on the bay now as I have solved my issue by accident.

Someone mentioned on another thread of mine about 'bridging' or putting the sky router into 'modem only mode' I couldnt find this option anywhere but I tried something and it worked just how I intended. God knows how, but it worked.

I connected the Sky router as normal to the ADSL line, connected ethernet socket one on the sky router to the DSL (incoming) socket on the linksys router and then from ethernet socket one on the linksys to the pc.

And it worked! I can access the internet as normal, and the DD-WRT data traffic is working so I can see the amount I am downloading!

Fantastic! Im sure many of you will read this and say wow hes managed to link two routers together, like thats never been done before! But I never knew you could connect an ADSL router to a DSL router then to a PC.

My knowledge of networking, ip addresses, ADSL, DSL, PPPoA, DHCP could be lost in a thimble.

Anyway, I hope this is of some use to someone, feel free to post your mocking comments about how dimm I am and how connecting two routers together is not the holy grail I thought it was! :p
 
Provided only one router is set as DHCP server for the network you can add many devices and they should all share the Internet.

I wasn't aware Sky were limiting some PPPoA connections. I still use PPPoA and get the ma rate but both routers I have had from them have no MER capability so I'm hoping it'll remain.

I also use two modem routers for different functions . One is modem, router and DHCP server while the other is just for wireless access so I can turn it off to stop the kids staying up until 4am on Facebook.
 
Why not just spoof the Sky router MAC or am I missing something?

Tried that, with the Draytek you can specify a MAC address, I used the same MAC Address from the sky router (on the bottom of it, on the label) but it still didnt work. As I mentioned above, upon checking my MAC address on the sky router web interface, it changed each time it was disconnected (adsl link broken) and reconnected, so each time I tried with the Draytek I didnt have a clue what the MAC address should have been. The whole MAC address didnt change, it was only the last character of the MAC address that would change.

Believe me, Ive tried pretty much everything and every time the Sky router gets a much bigger downstream than the Draytek. Drayteks answer was 'it should work out the box' as its setup for PPPoA. Which worked, but my connection was way way slower. I would love to know how people get on with the Draytek on different ISP's.
 
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Provided only one router is set as DHCP server for the network you can add many devices and they should all share the Internet.

I wasn't aware Sky were limiting some PPPoA connections. I still use PPPoA and get the ma rate but both routers I have had from them have no MER capability so I'm hoping it'll remain.

I also use two modem routers for different functions . One is modem, router and DHCP server while the other is just for wireless access so I can turn it off to stop the kids staying up until 4am on Facebook.

My Sky router is a Sagem F@ST 2504n. I moved to my current flat about 3 years ago and they issued a new router when I moved in. Before that I think it was a Netgear.
 
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