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FINAL UPDATE: Cisco.com Outage

Service to Cisco.com has been restored and all applications are now fully operational. The issue occurred during preventative maintenance of one of our data centers when a human error caused an electrical overload on the systems. This caused Cisco.com and other applications to go down. Because of the severity of the overload, the redundancy measures in some of the applications and power systems were impacted as well, though the system did shut down as designed to protect the people and the equipment. As a result, no data were lost and no one was injured. Cisco has plans already in process to add additional redundancies to increase the resilience of these systems. Again, we thank our customers and our partners for their patience during the resolution of this issue.

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8 Comments.


  1. Its actually nice to hear that the company takes electrical protection of employees seriously and the electricity was disconnected for safety at the expense of service.It is a little surprising that there wasn’t geographical backup though.

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  2. Do what I say, not what I do””… What about the ‘self defending network’. Is it just sales bulls?”

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  3. This is really really un-acceptable practice for any data center of any MNC, esp. when the customers (like me) totally depend upon Cisco.com and her resources.What about Global Load Blancing or Faul-Tolerance Lessons we have been taught on the various SRNDs on Cisco.com??Its really shocking to learn that the ENTIRE cisco.com website was down just because of SF Data Center power failure.. what if a quack hits or an hurricane / typhoon hits SF and all the power is lost???Why can’t Cisco Systems have Fault-Tolerant Data Center spread across the globe i.e. one in Europe and one in Asia-Pac for a better and easier management??

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  4. I never got a good vibe from Cisco, that’s why I use a Netgear hub and cat3 for my network.

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  5. It’d be interesting to know exactly what occurred, rather than just human error””.”

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  6. what if a quack hits””Just duck.”

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  7. Wow…I wonder how creative Cisco’s competitors are going to get with this information. Maybe Cisco should consider hiring from their partners…

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  8. When a notable site like Cisco.com is unavailable the Internet notices. Your communication is timely and transparent, especially given that there has not been time to conduct a full post-mortem RCA on this event. Happily, no one was injured and you were able to recover relatively quickly. Kudos to Cisco for taking care of its people and communicating openly regarding this event.

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