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! 🙂
https://www.engadget.com/2017/11/07/comcast-internet-outage-level-3-route-leak/
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!
https://dyn.com/blog/widespread-impact-caused-by-level3-bgp-route-leak/
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