Senior government sources have told CBS News that the fault behind the nationwide US ground stop was isolated to specific hardware: Cisco 600 series routers manufactured between 2001 and 2006. CBS said it was told this on Friday 13 November.
This is the first report to name a router make and age range. Earlier accounts cited a router problem or a network update without any hardware detail.
CNBC separately reports that officials cited products and services from Cisco and L3Harris when discussing the router problems on Saturday.
The CBS sources are anonymous, and officials have not named the faulty router on the record. Transportation Secretary Sean Duffy has said it is undetermined whether contractor error or a faulty router was to blame, Yahoo News reports. The Cisco account therefore remains unconfirmed and has not been independently checked.