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3 posts

FreeBSDDeep Dive October 3, 2026 8 min read

FreeBSD ARP Cache Operations: Trace IPv4 Neighbor Resolution on Ethernet

Diagnose FreeBSD IPv4 reachability by checking routes, per-interface ARP entries, duplicate-address symptoms, and packet exchanges before clearing state.

#freebsd#arp#ethernet

Tech HistoryDeep Dive July 12, 2026 7 min read

Ethernet: From Xerox PARC's Experimental Network to IEEE 802.3

How Ethernet moved from a roughly 3-megabit coax experiment to switched full-duplex links without depending on collisions forever.

#ethernet#networking#ieee

FreeBSDFix July 11, 2026 6 min read

Diagnosing FreeBSD Ethernet Link Flapping at the Driver Level

How to correlate FreeBSD link events, counters, negotiated media, switch logs, optics, driver messages, and EEE before changing anything.

#networking#drivers#ethernet