[c-nsp] PPPoE L2 timeout recovery

[Masood Ahmad Shah]

It is very clear your Cisco DSL route sends PPPoE Active Discovery
Initiation (PADI) frames to the ISP with no response. The PADI frame is the
first in a series of PPPoE call-setup frames. If your ISP does not respond
with a PPPoE Active Discovery Offer (PADO), PPPoE negotiation does not
succeed. The only solution for this problem is to contact your ISP or check
your line stability. 


Regards,
Masood Ahmad Shah




-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Jason Gurtz
Sent: Tuesday, February 05, 2008 12:25 AM
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] PPPoE L2 timeout recovery

I have a 3640A with a WIC1-ADSL residing in an NM-1FE1R2W.  IOS is
12.4(13b)

Periodically, about every month or two, the dsl link will drop and
debugging output shows:
... Sending PADI: vc=0/35
... padi timer expired

Doing a shut no shut on atm2/0 seems to bring the line up back up and it
then works fine for another month or two until I have to do it again.  The
amount of traffic doesn't seem to trigger this behavior.  The shut no shut
seems to cause a line retrain on this platform since the CD light goes out
after the shut.  

Is this necessarily an ISP problem, or is there something I might be
missing on my end like overflowing some NAT table or something?  Any other
config I should provide?

~JasonG

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