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Retrospective · Canada, July 2022 · published

How a maintenance update took down Canada's Rogers

Este artículo está en inglés.

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On 8 July 2022, one of Canada's biggest telecom companies fell off the internet. Mobile, home internet, debit card payments and even emergency calls stopped working for millions of people, for most of a day. The cause was a maintenance update.

What happened

  • 8 Jul 2022, early morning (Eastern time) Rogers ran an update in its core network. As the company later told the regulator, the code removed a routing filter, which flooded its core routers with routes until they stopped working.
  • Within minutes Rogers' announcements to the rest of the internet were withdrawn: the routing monitor Kentik saw nearly all of the roughly 1,000 address blocks Rogers normally announces disappear. NetBlocks measured a 25% drop in connectivity across Canada.
  • Same day Interac debit payments failed nationwide, and some people could not reach 911.
  • 8–9 Jul Service came back for most customers after about 15 hours; some reported problems for days.

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Why it mattered

A single company's mistake took down payments, hospitals' phone lines and emergency services across a G7 country. Canada's government afterwards required the big telecom companies to support each other during outages, including roaming for emergency calls.

What Blackout Map shows

This one is in our archive. The IODA data we imported marks a partial outage in Canada from 8 July 08:45 to 9 July 00:30 UTC, with the country's reachability falling to about 79% of normal at its worst. One provider failing in a big country looks like that: not a blackout, but a clear national dip. See Canada's outage history.

Sources

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Blackout Map is a live map of internet outages and shutdowns around the world. Open the map · Security watch · RSS · Follow us on X: @Blackoutmap_net

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