set net:limit-rate «download bytes» : «upload bytes»
Download y Upload 20mbps
set net:limit-rate 10480000:10480000
set net:limit-rate 15480000:15480000
set net:limit-rate 20480000:20480000
10 Kb/s -> 10240
500 Kb/s -> 512000
Example: Upload 512kbs
set net:limit-rate 0:512000
Example: Upload 20mbps
set net:limit-rate 0:20480000