Cisco routers were the source of a major outage May 15 in an NTT network in Japan, according to an investment firm bulletin.
Between 2,000 and 4,000 Cisco routers went down for about 7 hours in the NTT East network after a switchover to backup routes triggered the routers to rewrite routing tables, according to a bulletin from CIBC World Markets. The outage disconnected millions of broadband Internet users across most of eastern Japan.
Cisco says it could not say which specific router models were involved.
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