The Border Gateway Protocol (BGP) can be very unforgiving and that is what Level 3 communications found out the hard way on Monday. It appears that a BGP configuration mistake by Level 3 ended up taking down large sections of the Internet (mostly Comcast users it appears) in the U.S. I would love to know more details! The last time Level 3 had this happen was back in 2015 and the link to both articles can be found below! Glad I was not the network engineer behind the keyboard on this one! 🙂
EDIT: 12 NOVEMBER 2017
Just a quick ‘THANK YOU’ to Daniel Dib who was kind enough to provide me with a link to a write-up with some amazing technical details regarding this outage…VERY GOOD STUFF! Enjoy!