@dungeon_master the cap isn't very precise, for me, i set it to 256kbps up and down, and speedtest.net gave me 1.2mbps down, 0.5mbps up, but it's close enough to fix the problems I was having with large downloads
the top article with wondershaper, is what worked fine for me, https://vitux.com/how-to-limit-network-bandwidth-in-ubuntu/
i didn't try the second article i'd linked to, as my problem was resolved
Long time roleplayer, with history in MUSH, tabletop. I've played or run most editions of D&D, and also love the Cortex+ system, and a number of other.