Router not seeing modem

[#1]

On Friday my fibre broadband dropped and the DSL light on the modem went out. I called support and they said it sounded like a fault on the modem. Yesterday I remembered I had a spare modem, so I switched them over and now the DSL light comes on solid, so it looks like they were right - but now my router isn't seeing the modem.
If I telnet in and try
=>dns server route list
I get nothing listed. Do I need to do something to make the router see the modem?

[#2]

It is possible that whatever caused the BT OR modem to die has also damaged the WAN port of the router. I take it you've tried completely powering off the router? As I had a similar issue when relocating the router at the end of a 15m Ethernet cable.

[#3]

I have powered off the router, it made no difference. I suspect you may be right that the WAN port is damaged. 

[#4]

Hi,
I'm assuming you're using the router we sent you?
Might be worth trying a factory reset.

[#5]

Yes, I am. I've tried a factory reset, it didn't help.

[#6]

I'll happily go away if it seems I'm trying to teach you to suck eggs but you are plugging into the correct port at both the router and the modem aren't you?

[#7]

Yes, it's definitely all connected correctly.

[#8]

And the spare router has the fibre modification done? If it's an ADSL version it won't work...

[#9]

It is in Lan1* on the Openreach modem * to Wan {or port 4 on some older thomson's with bridge mode}
*Lan2 on the openreach modem will only work if its an unlocked unit.
Thx

[#10]

Have you tried a direct connection to the BT modem.
http://community.plus.net/library/broadband/fibre-help-how-to-set-up-a-pppoe-dialler-in-vistawindows...
It will prove if the spare modem is connected and working.

[#11]

Quote from: Jaggies

And the spare router has the fibre modification done? If it's an ADSL version it won't work...

Ah, I'm not sure about that. Any way I can find out?

Quote from: Webif

It is in Lan1* on the Openreach modem * to Wan

It is.

Quote from: npr

Have you tried a direct connection to the BT modem. http://community.plus.net/library/broadband/fibre-help-how-to-set-up-a-pppoe-dialler-in-vistawindows...

I hadn't. I'll give it a try.
I've now tried replacing the router as well as the modem (with a TP-Link TL WR841N, which Google tells me should be compatible) but when it tries to connect, it gets a "Timeout waiting for PADO packet". I *think* I've configured it correctly. Don't know if that information is helpful?

[#12]

Quote from: npr

Have you tried a direct connection to the BT modem. http://community.plus.net/library/broadband/fibre-help-how-to-set-up-a-pppoe-dialler-in-vistawindows... It will prove if the spare modem is connected and working.

Error 651: The modem (or other connecting device) has reported an error.
I'm guessing this means my spare modem hasn't had the conversion for fibre as Jaggies suggested?

[#13]

Not quite, assuming it's am Openreach modem then it's a VDSL(2) (FTTC) modem.
Jaggies was referring to your spare router - if it was another TG582n then it could have firmware that makes it unsuitable for FTTC

[#14]

Ah, right - I was confused because I hadn't tried a different router at that point. The one I've tried since is suitable for fibre, though as a direct connection to the modem failed I guess that's not the issue.
dick:quote

[#15]

Sorry, I thought you had replaced the router, not the modem, in which case ignore my previous post.
If you Google "pppoe error 651" there are 56000 results, so it appears to be a common issue. Looks like the raspppoe.sys file is the culprit. How you fix it is dependent on the OS version you are running.