Wireshark mailing list archives
Re: TCP Window Size and MTU/MSS
From: Sake Blok <sake () euronet nl>
Date: Thu, 10 Feb 2011 15:04:26 +0100
On 10 feb 2011, at 14:20, neerav panwar wrote:
I have seen whatever be the receive window size, TCP sens ack after 2 or 3 packets of any length. It doesn't receive data as per window size. Exa: If receive window size is 64000 bytes and MSS/MTU is 1460 then ACK should come after 64000/1460 packets. But receiver always sends ack after 2 or 3 packets maximum. The changes done on tcpackfrequency doesn't pay off on a windows XP. What is the way decrease the number of ACKs over the link?
See RFC 2581 part 4.2 : The delayed ACK algorithm specified in [Bra89] SHOULD be used by a TCP receiver. When used, a TCP receiver MUST NOT excessively delay acknowledgments. Specifically, an ACK SHOULD be generated for at least every second full-sized segment, and MUST be generated within 500 ms of the arrival of the first unacknowledged packet. (http://www.faqs.org/rfcs/rfc2581.html) Cheers, Sake ___________________________________________________________________________ Sent via: Wireshark-users mailing list <wireshark-users () wireshark org> Archives: http://www.wireshark.org/lists/wireshark-users Unsubscribe: https://wireshark.org/mailman/options/wireshark-users mailto:wireshark-users-request () wireshark org?subject=unsubscribe
Current thread:
- TCP Window Size and MTU/MSS neerav panwar (Feb 10)
- Re: TCP Window Size and MTU/MSS Sake Blok (Feb 10)
- Re: TCP Window Size and MTU/MSS Hansang Bae (Feb 19)
- Re: TCP Window Size and MTU/MSS Sake Blok (Feb 10)