Cisco Outage Due to Human Error

Internet and web hosting research group Netcraft says that human error was responsible for a data center electrical overload that knocked the Cisco Systems website offline on Wednesday.

The outage lasted for about three hours and came as Cisco released four security advisories about vulnerabilities in its networking products and left system administrators unable to access Cisco's support resources. However, the company maintained communication with its users through, which is hosted on another network.

In an update, Cisco officials said the issue occurred during preventative maintenance of one of its data centers when a human error caused an electrical overload on the systems, which caused and other applications to go down. The company adds that because of the severity of the overload, the redundancy measures were impacted as well, but the system did manage to shut down as designed to protect the people and equipment.

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