Date: Wed, 8 Aug 2001 10:25:33 -0700 From: Brooks Davis <brooks@one-eyed-alien.net> To: Mike Tancsa <mike@sentex.net> Cc: freebsd-net@FreeBSD.ORG Subject: Re: gif MTU of 1280 ? Message-ID: <20010808102533.A31154@Odin.AC.HMC.Edu> In-Reply-To: <5.1.0.14.0.20010808101139.0277e010@marble.sentex.ca>; from mike@sentex.net on Wed, Aug 08, 2001 at 10:22:22AM -0400 References: <5.1.0.14.0.20010808101139.0277e010@marble.sentex.ca>
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--/9DWx/yDrRhgMJTb Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Aug 08, 2001 at 10:22:22AM -0400, Mike Tancsa wrote: >=20 > Just wondering, is there a reason why the MTU of the gif interface defaul= ts=20 > to 1280 ? Why not 1500 ? It can't be 1500 because the tunneling protocol is designed to use an MTU which insures that packets don't get fragmented (except in one weird edge case.) Since there is a wrapping IP header, the MTU of an IP over IP tunnel can be no more then 1480 in the common case. -- Brooks --=20 Any statement of the form "X is the one, true Y" is FALSE. PGP fingerprint 655D 519C 26A7 82E7 2529 9BF0 5D8E 8BE9 F238 1AD4 --/9DWx/yDrRhgMJTb Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (GNU/Linux) Comment: For info see http://www.gnupg.org iD8DBQE7cXYNXY6L6fI4GtQRAsKAAKDNio2kyiD++B0keBX+/KScYqy9RgCghkXJ 4Sdc/wa10ivwIzaxqhk97Uo= =Fj8L -----END PGP SIGNATURE----- --/9DWx/yDrRhgMJTb-- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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