ATT GigE issue on 11/19 in Kansas City

[bdflemin at gmail.com (Brad Fleming)]

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 at gmail.com>  wrote:
>>> On Nov 29, 2011, at 8:17 PM,<comptech at 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!