From owner-freebsd-questions Wed Feb 27 16:48:42 2002 Delivered-To: freebsd-questions@freebsd.org Received: from green.gng.co.kr (green.gng.co.kr [211.115.192.3]) by hub.freebsd.org (Postfix) with ESMTP id C8A2937B402 for ; Wed, 27 Feb 2002 16:48:35 -0800 (PST) Received: by GREEN with Internet Mail Service (5.5.2653.19) id ; Thu, 28 Feb 2002 09:35:50 +0900 Message-ID: <72ED4C1E297BD5119BDE00B0D049185201738F79@GREEN> From: =?euc-kr?B?wOW8usij?= To: questions@FreeBSD.org Subject: [Q] rfc1323 option implementation Date: Thu, 28 Feb 2002 09:35:49 +0900 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: text/plain; charset="euc-kr" Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG I uploaded below question on newsgroup, comp.unix.bsd.freebsd.* first, but I didn't get any clue yet. If you please, let me do something. ====================================================== Hi..... I'm testing the network performance with 'sysctl' and I found there are some options related my testing. 'net.inet.tcp.rfc1323' is the one of them. IMHO, as you know, because 'TCP Window Size' affects the TCP/IP throughput, I tried to increase it. But, I also noticed that it could not be increased up to 65535 (=64KB) with turning on the RFC1323 option ( window scale & Time stamp ). This is my dilemma. :( If I turned on, 'time stamp' option would decrease 'Tcp Window Size' automatically and if I turned off, I could not set up the windows size up to 65KB as a matter of course. :( 'time stamp' affects the value of 'cwnd' maybe, so 'cwnd' decreases the next maximum window size (which is recommended by some RFC maybe). In case of Win2K, there are 0~3 options for RFC1323 and turn on/off the two options independently and linux can do it also. On FreeBSD 4.5, can I disable the Time Stamp option ONLY ?? Do I have to modify the kernel source like 'netinet' ?? Regards... ^ ^ w===================================w GNG Networks/IDC System SE Seongho Chang ( black@gngidc.net ) Tel +822-2105-6072 Fax +822-2105-6100 ================================== To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message