Shared bandwidth in limiters or separate?
If I configured 2 Mbps limiters in both directions, would the individual IP addresses being put into the limiters each get their own 2 Mbps allocation, or would they all share the same 2 Mbps bandwidth?
I think I see now–if you want the bandwidth to be shared then the limiter mask should be 'None', if you want dynamic non-shared bandwidth then the limiter mask should either be 'Source' or 'Destination'.
That's correct. Unmasked limiters are global for any traffic in the limiter. Masks define how to group them into per-group limits (on 2.1 you can mask by IP or by subnet)