Date: Fri, 04 May 2007 21:15:33 +0200 From: Andre Oppermann <andre@freebsd.org> To: Preethi Natarajan <nataraja@cis.udel.edu> Cc: freebsd-net@freebsd.org, "Paul D. Amer" <amer@cis.udel.edu> Subject: Re: Details on TCP implementation Message-ID: <463B8655.6020401@freebsd.org> In-Reply-To: <463B8156.8060708@cis.udel.edu> References: <463B8156.8060708@cis.udel.edu>
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Preethi Natarajan wrote: > Hello, > > I am trying to understand the following details about TCP implementation > in FreeBSD (6.1). > > - The sack.enable sysctl turns on SACK options (RFC2018)? Yes. It allows SACK to be negotiated during the SYN/SYN-ACK session setup. > - Does the implementation leverage SACK information for retransmissions > (RFC3517)? Yes. > - Is Appropriate Byte Counting (ABC) available (RFC3465) now/in the future? Not yet but in the future. It is currently being implemented along with a 'pluggable' congestion control framework for TCP. -- Andre
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