for the benchmark testing,connected two c2811 router back-to-back with RJ45 cross cable and used the command TTCP to test the thrughput. One c2811 acting as transmitter and the other acting as receiver. However repeatedly im getting the througput of 3386Kbytes/s. However the theoretical value is 12500Kbytes/s. Im using the tcp window size of 8Kbyte.
Simlar test when run over v.35 bk-to-bk, produces the result nearly equal to 256kbytes/s.