https://darrenqu.net/tags/ipv6/Technical writing on network engineering: campus and WAN, hybrid cloud interconnect, automation and observability, and the data center fabrics — InfiniBand, RoCE, Spectrum-X — underneath GPU clusters.Hugoen-USDarren QuDarren Qu2026 Darren QuThu, 02 Mar 2023 00:00:00 +0000https://darrenqu.net/enterprise-network/rogue-dhcpv6-server-postmortem/Thu, 02 Mar 2023 00:00:00 +0000https://darrenqu.net/enterprise-network/rogue-dhcpv6-server-postmortem/Enterprise Networkipv6An office network with no IPv6 deployment lost web access. The cause was a personal router advertising IPv6 — and a DHCP snooping configuration whose scope did not cover it.