Optus Says Cisco Routers Responsible for Nationwide Outage

Optus CEO Kelly Bayer Rosmarin faced a grilling from senators about the telco’s handling of last week’s 14-hour nationwide outage,  which she said was caused by Cisco routers. 
“[The root cause of the issue] was that Cisco routers hit a fail-safe mechanism, which meant that each one of them independently shut down. That was triggered by the upgrade on the Singtel international peering network,” Ms. Rosmarin said. 
Greens Senator Sarah Hanson-Young pointed out that Optus initially blamed Singtel’s software upgrade for causing the outage, which stopped millions of Australians, 40,000 businesses, and emergency services from calling or taking card payments on Nov. 8. …