512k day

Um problema de confiabilidade, não de segurança:

512k day is the unofficial title of an event that started on August 12, 2014. Multiple Internet routers, manufactured by Cisco and other vendors, encountered a default software limit of 512K (512,000 - 524,288)[1][2] IPv4 BGP routing table entries, causing assorted outages at various data centers. Various IT professionals reported the issue on Internet forums, sometimes as just "512k", and under a Twitter hashtag of #512k.

fonte: wikipedia