September 17 2011
Just a quick one. All latest versions of version 15.1 IOS on CCO have a major bug when it comes to ADSL.
If the underlying ATM interface bounces at any point, the PPPOA dialer interface will go down, and will never recover without a reboot. The ATM interface will show as up, however all outbound packets will be dropped. PPP will show request time outs as if the remote end isn’t responding.
We have a TAC case open and will update this post with fix details. It’s been acknowledged by TAC as a bug.
15.0(1)M trains seem to be ok, and it seems to be something that has crept into 15.1.