> If you ever see packet loss in a trace at one step but the steps after it aren't showing it, you can ignore that packet loss, it's likely a CPU limitation on a busy router.
Trippy now includes [0] forward loss (Floss) and backward loss (Bloss) _heuristics_ to help surface such behaviour.
The idea was inspired by our previous discussion [1] on the topic on HN some time ago!
These columns are experimental and so not shown by default but can be enabled [2].
a blog about traceroute in 2026. imagine that. hard to believe it could possibly be of any interest at all, especially written by someone that only just discovered it. but i'm oh so glad i stopped in, to learn about trippy! it looks amazing.