Networking/Discussion/Networking Drivers/TCP Window size/List of Posts
 
Forum Topic - TCP Window size: (6 Items)
   
Update
Abhay Ravi Chandran
05/06/2013 6:00 PM
post101193
TCP Window size   
Hi,
      I was trying to run iperf with a TCP window size of 256 KB but find that the default window size is limited to 32 
KB. Is there any way to change this or is the NetBSD stack limiting the TCP window size to 32 KB. 

Thanks
Regards
Abhay
Sean Boudreau(deleted)
05/06/2013 6:06 PM
post101194
Re: TCP Window size   
There's an iperf  option to vary this.

Sent from my BlackBerry 10 smartphone on the Rogers network.
From: Abhay Ravi Chandran
Sent: Monday, May 6, 2013 6:00 PM
To: drivers-networking
Reply To: drivers-networking@community.qnx.com
Subject: TCP Window size


Hi,
I was trying to run iperf with a TCP window size of 256 KB but find that the default window size is limited to 32 KB. Is
 there any way to change this or is the NetBSD stack limiting the TCP window size to 32 KB.

Thanks
Regards
Abhay



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Networking Drivers
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Abhay Ravi Chandran
05/07/2013 10:57 AM
post101224
Re: TCP Window size   
I tried to change the window size using the -w option but it gives a warning saying window size requested is 256 KB but 
current window size is 32 KB. Some research on the internet led me to the conclusion that the TCP window size is 
dependent on the network stack. I wanted to know what is the TCP window size supported by the QNX network stack?
Sean Boudreau(deleted)
05/07/2013 11:37 AM
post101230
Re: TCP Window size   
Yes, it's handled by the network stack, just like on every other OS out
there.  Various window sizes are supported.



On Tue, May 07, 2013 at 10:57:41AM -0400, Abhay Ravi Chandran wrote:
> I tried to change the window size using the -w option but it gives a warning saying window size requested is 256 KB 
but current window size is 32 KB. Some research on the internet led me to the conclusion that the TCP window size is 
dependent on the network stack. I wanted to know what is the TCP window size supported by the QNX network stack?
> 
> 
> 
> _______________________________________________
> 
> Networking Drivers
> http://community.qnx.com/sf/go/post101224
> To cancel your subscription to this discussion, please e-mail drivers-networking-unsubscribe@community.qnx.com
Abhay Ravi Chandran
05/07/2013 12:19 PM
post101233
Re: TCP Window size   
How do I change the TCP window size in QNX 6.5.0 SP1 to 256KB ?
Sean Boudreau(deleted)
05/07/2013 12:24 PM
post101234
Re: TCP Window size   
setsockopt(s, SOL_SOCKET, SO_RCVBUF, ,)

Sent from my BlackBerry 10 smartphone on the Rogers network.
From: Abhay Ravi Chandran
Sent: Tuesday, May 7, 2013 12:19 PM
To: drivers-networking
Reply To: drivers-networking@community.qnx.com
Subject: Re: TCP Window size


How do I change the TCP window size in QNX 6.5.0 SP1 to 256KB ?



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Networking Drivers
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