On 07/07/16 09:43, Tim Bray wrote: ...
I ask because lots of enterprise type switches can do basic rate limiting.HP instructions: http://www.hp.com/rnd/support/manuals/pdf/release_06628_07110/Bk2_Ch4_Rate_Limiting.pdf
I would lab that up first very carefully. I have had an HPE (Comware) go erratic on me recently.
Token Bucket Filter (TBF) is nothing new, but you may find -- if you choose to implement rate-limiting in software -- that your CPU requirements for forwarders increase sharply.