Hi all,

I would like to implement the RFC 2414 or 3390 dealing with a large TCP initial window. Indeed, in most linux TCP implementation, initial_Win=2 TCP segments but it is possible to increase it to 3 or 4 segments depending on the MSS as mentioned in RFC 3390 :

"The upper bound for the initial window is given by :

min (4*MSS, max (2*MSS, 4380 bytes))"

Thus, for MSS=1460, initial_TCP_window = 3 MSS. I would like to modify this value in Linux but I don't know how to do it ? I thought it was the purpose of wmem and rmem but in fact no. I can install any kernel version to achieve this. This is very important because it increases a lot the performance for small data transfers.

Thanks in advance,

Nicolas.

Hi Nicolas,

I run into the same problem. Did you had any luck with finding a solution?

Thanks,
Yair