Global Microsoft cloud-service outage traced to rapid BGP router updates
Outages that made Microsoft Azure and multiple Microsoft cloud services widely unavailable for 90 minutes on Jan. 25 can be traced to the cascading effects of repeated, rapid readvertising of BGP router prefixes, according to a ThousandEyes analysis of the incident.
The Cisco-owned network intelligence company traced the Microsoft outage to an external BGP change by Microsoft that affected service providers. (Read more about network and infrastructure outages in our top 10 outages of 2022 recap.)
Multiple Microsoft BGP prefixes were withdrawn completely and then almost immediately readvertised, ThousandEyes said. Border gateway protocol (BGP) tells Internet traffic what route to take, and the BGP best-path selection algorithm determines the optimal routes to use for traffic forwarding.
from Network World https://ift.tt/8G5i30Z
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