We are using two 633's on a central location with 120 degrees antenna's as a central access point. There are 6 clients (also using 633's) connected to it using EoIP bridges. Most of the clients are connected on a 54/54 mbps rate with CCQ's between 90 and 100%. Most clients are limited in bandwidth to 5/5 mbps. We want to set one client to unlimited throughput, but we don't get more than 12 to 14 mbps (upstream) and 700 kbps (downstream) on the wireless interface (even while all other clients are using no traffic at all). I have disabled connection tracking, but that doesn't seems to help. We are not using any firewall rule or NAT.
What can we try to increase the throughput?