TCP initial congestion window (slow-start)


 
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# 1  
Old 12-24-2011
TCP initial congestion window (slow-start)

I have noticed that the initial congestion window in my traces is 8920bytes~=6*1448. rfc3390 states the initial cwand should be max 4000 bytes(around 3*1448).

At first i thought it might be because i'm running my server on mac os x, so apple might have modified the tcp stack. Therefore I tried running the server on a Linux box (2.6.38) however i'm getting similar results 13032bytes=9*1448. Both server and client machines are running on a local network (via a router). Any ideas why the initial cwand is so large?

Last edited by ddayan; 12-24-2011 at 06:59 AM..
# 2  
Old 12-24-2011
It's time to check with your network administrator.

Quote:
Slow-start is used in conjunction with other algorithms to avoid sending more data than the network is capable of transmitting, that is, to avoid causing network congestion.
# 3  
Old 12-24-2011
What is the other system? A Microsoft Windows box?
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