[rbak-nsp] Strange auth problem after enabling mlppp

[Andy Dills]

On Tue, 27 Jul 2010, Ian Calderbank wrote:

> Hey, an SMS500. Nice to see some history still going. J

It was purchased used in like 2003, when Verizon finally rolled out DSL 
in our LATA, and hasn't so much as blinked since. We picked up another 
used one just in case this one ever died.

> Debug ppp and/or aaa on your sms, can't remember the sub-options but you
> want the one that shows you the contents of the LCP messages.

That makes sense...

I just turned on "debug ppp lcp".

However, I'm having a hard time getting the debug messages sent via 
syslog. It's not the end of the world to get them from the unit directly 
(they show up in "show log"), but it's odd to me that the debug logs 
aren't being sent with the rest of the info being sent via syslog. If 
anybody has any thoughts on that I'm all ears.

I'll test again tonight and see what I see on the redback end.

> Its probably the two ends disagreeing about lcp options, with the obvious
> suspect being multilink. It may be that your modem doesn't like being
> offered it, and one end or the other is refusing to negotiate it away.
> Without debug info, its hard to know which.

That makes sense. 

> MLPPP Bonding is notoriously hard to get working on dsl, good luck. I have
> some alternative technology suggestions to achieve that end if you want, PM
> me.

Would you mind explaining why it's hard to get working? That seems 
strange to me, given that it works just fine when doing things like 
bonding 6 DS1s. Is it the asynchronicity? 

I haven't found much about mlppp DSL when searching. We're planning on 
using a cisco 1700 with 2 DSL WICs on the CPE side.

Initially, this is to supply me and one of the other partners with a 
beefier connection at home, so we're pretty motivated to find a way to 
make it happen, even up to purchasing a newer AOS (is that even possible?) 
or equipment.

Thanks,
Andy

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Andy Dills
Xecunet, Inc.
www.xecu.net
301-682-9972
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