Re: ATT GigE issue on 11/19 in Kansas City

[Brad Fleming <bdflemin () gmail com>]

On Nov 30, 2011, at 9:51 AM, Blake Hudson wrote:

> Stefan wrote the following on 11/30/2011 8:53 AM:
> > On Wed, Nov 30, 2011 at 8:21 AM, Brad Fleming<bdflemin () gmail com>  wrote:
> > > On Nov 29, 2011, at 8:17 PM,<comptech () kc rr com>  wrote:
> > >
> > > > We lost several of our GigE links to AT&T for 6 hours on 11/19, anyone else see this and get a root cause from 
> > > > AT&T? All I can get is that they believe a change caused the issue.
> > > We lost several (but not all) of our Optiman circuits on 11/19 at about 10:20am. We were told the root issue was 
> > > that all VLANs in one of their switches had been accidentally deleted / removed. We were never able to get any 
> > > additional detail (like "how") but services were restored about 16:45.
> > +1 to the above - we received the following RFO, from the their NOC:
> >
> > "All impacted VLANS were rebuilt to restore service. It is believed
> > there were some configuration changes that caused the VLAN troubles. A
> > case has been opened with Cisco to further investigate the root
> > cause."
>
> Sounds like a VTP mishap.
That was my first thought as well.. it would just surprise me if a huge provider like AT&T was using VTP instead of 
using a provisioning tool that automates the manual pruning process to avoid issues like this. In either case I'm a 
customer and will likely never be told what went wrong. I'm OK with that so long as it doesn't happen again!