Date: Fri, 10 Dec 1999 13:00:10 +1300 From: "Juha Saarinen" <juha_saarinen@email.msn.com> To: "freebsd-questions@FreeBSD. ORG" <freebsd-questions@FreeBSD.ORG> Subject: TCP Large Windows etc. Message-ID: <LNBBIBDBFFCDPLBLLLHFKEFGGFAA.juha_saarinen@email.msn.com>
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Been poking around with sysctl -a and noticed the following: net.inet.tcp.rfc1323 = 1 net.inet.tcp.recvspace = 16384 net.inet.tcp.sendspace = 16384 net.inet.tcp.sack = 1 net.inet.tcp.mssdflt = 512 I read that as RFC1323 TCP extensions are enabled, ditto TCP Selective Acknowledgements (SACKs), both what I want. However, the default Receive and Send buffer is only 16,384 bytes and is the default Maximum Segment Size really only 512 bytes? I know how to change the values with sysctl -w, but I was wondering why they're set so low. Linux 2.2.x scales TCP windows up to 32KB by default, with a limit of 256KB max (I think). Does the FreeBSD TCP/IP stack support window scaling as well? Cheers, -- Juha To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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