One of our ISPs, CrownCastle, had discovered a routing instability within their network impacting multiple customers. A peering point failure was identified with one of our partner carriers. Network traffic has been routed to an alternate provider. CrownCastle Network Analysts have confirmed routing issues have cleared. We will continue to monitor network health to confirm stability.
This only impacted a small subset of customers in the Northeast and Midwest that were also co-located in the NY and VA Datacenters. This did not impact Azure hostings in the USA, Hong Kong, or West India.