How to limit the band width usage?

[jronald]

Within a LAN, if I don't limit the band widht usage when do
"pkd_add -r" or "port". Others will complain.

 

[hydra]

You will probably need to use a firewall with some prioritization (QoS). A good start would be to read:
http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/firewalls-pf.html