Re: [outages] Major Level3 (CenturyLink) Issues

[Dantzig, Brian]

Cisco had a bug a few years back that affected metro switches such that they 
would not withdraw routes upstream. We had an internal outage and one of my 
carriers kept advertising our prefixes even though we withdrew the routes. We 
tried downing the neighbor and even shutting down the physical interface to no 
avail. The carrier kept blackholing us until they shut down on their metro 
switch.