CenturyLink’s Sunday morning outage takes down Cloudflare, Hulu, Amazon and others

CenturyLink suffered a widespread network outage across the U.S. Sunday morning, which had a ripple effect across sites such as Cloudflare, Hulu and Amazon, among others.

ThousandEyes, which is a monitoring company that’s being bought by Cisco, said in an email to FierceTelecom Sunday afternoon that it detected a large-scale outage on CenturyLink’s Level 3 backbone starting at 6 a.m.

“Level 3 is used as a transit provider for many app providers, so it had a significant cascading impact on global connectivity to thousands of services,” ThousandEyes said in the email.  

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CenturyLink’s network provides core IP, voice, video, and content delivery for a large number of carriers across North America, Latin America, Europe, and some of Asia. CenturyLink said the IP-outage was fixed just after 11 a.m. and that all of the services that were impacted had been restored.

“Today we saw a widespread internet outage online that impacted many multiple providers,” Cloudflare CTO John Graham-Cumming said, in a statement. “This was not a Cloudflare-specific outage. Level 3/CenturyLink was responsible for an outage that affected many internet services, including Cloudflare. Cloudflare’s automated systems detected the problem and routed around them, but the extent of the problem required manual intervention as well.”

Cloudflare provided a detailed account of CenturyLink’s outage in a Sunday blog, which said that traffic dropped to “near-zero during the incident.”

RELATED: Level 3 technician’s misstep causes largest outage ever reported

“On August 30, customers in several global markets were impacted by an IP outage across the network,” a CenturyLink spokesman said in an email Sunday afternoon to FierceTelecom. “We can now confirm that all services have been restored.”

CenturyLink didn’t provide any additional details on the IP outage.

CenturyLink, which bought Level 3 three years ago for $34 billion, said the IP outage affected its content delivery networks (CDNs), according to a story by CNN.  

The network outage also caused IPv4 problems in Europe. “IPv4 peering with CenturyLink AS3356 has now been re-enabled globally as they report the incident has been resolved,” according to a Twitter post by Telia Carrier, which has one of the world’s largest backbones.

Source: Twitter




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