[RP-PPPoE] Multilink PPPoE

[Gordon Henderson]

A bit stuck here wondering what to do... Wondering if there is anyone here 
who might even give me a pointer to the source of the issue I'm 
having...

Anyway - I have a Linux router, multiple Ethernet ports, and 2 ADSL lines 
which the ISP has bonded. I need to get multilink PPPoE going.

And I can - that's not the issue - the issue is that the router seems to 
corrupt outgoing SYN packets when the lines are bonded.

I can bring either line up on it's own with the multilink setting in the 
config file and it's fine - can transfer data OK, but when I bring the 2nd 
line in, it joins the bundle, and it's still fine - any transfer in 
progress keeps on going - double the speed - until something sends a SYN 
up or down the line, then the router sends out a corrupted packet out on 
one link and the far-end doesn't like it.

I've tried various kernels from 2.6.27 to 3.0.4 with the same results. The 
underlying Linux distro is Debian 6, but I've also tried the userland 
PPPoE drivers as well as the kernel ones.

This is in the UK if that makes a different - the router is an intel 
processor with 8 Ethernet ports - 2 of them go to Draytek Vigor 120 ADSL 
modems which act as PPPoA to PPPoE bridges (PPPoA over the copper phone 
lines to the exchange and to the ISP) The same router is running another 
PPPoE connection to a 3rd Vigor 120 to a different ISP - this is fine, 
although I have tried a separate router when I was fiddling with kernel 
versions, etc.

So does anyone actually have a working multilink PPPoE setup?

Or any pointers on where I might be going wrong (if I am - right now, I 
can't see what's wrong other than pointing the finger at the mulilink code 
in the kernel causing the corruption)

Thanks,

Gordon