From owner-freebsd-net Wed Jun 21 20:43:56 2000 Delivered-To: freebsd-net@freebsd.org Received: from khavrinen.lcs.mit.edu (khavrinen.lcs.mit.edu [18.24.4.193]) by hub.freebsd.org (Postfix) with ESMTP id EE9EB37B6DF for ; Wed, 21 Jun 2000 20:43:52 -0700 (PDT) (envelope-from wollman@khavrinen.lcs.mit.edu) Received: (from wollman@localhost) by khavrinen.lcs.mit.edu (8.9.3/8.9.3) id XAA42436; Wed, 21 Jun 2000 23:43:40 -0400 (EDT) (envelope-from wollman) Date: Wed, 21 Jun 2000 23:43:40 -0400 (EDT) From: Garrett Wollman Message-Id: <200006220343.XAA42436@khavrinen.lcs.mit.edu> To: "Louis A. Mamakos" Cc: freebsd-net@FreeBSD.ORG Subject: Re: Using timestamp option of ip header (IPOPT_TS) In-Reply-To: <200006220225.WAA35025@whizzo.transsys.com> References: <200006220225.WAA35025@whizzo.transsys.com> Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org < said: > I don't think you want any IP options present at all. Depending on the > specific implementations in routers, some (most?) will punt IP datagrams > with options to a conventional CPU to process. It's even worse than that... some routers will punt any packets which: - are fragmented - have options - don't have the ``right'' protocol field The second is well-known; I've heard of the first and have actually measured the third. -GAWollman -- Garrett A. Wollman | O Siem / We are all family / O Siem / We're all the same wollman@lcs.mit.edu | O Siem / The fires of freedom Opinions not those of| Dance in the burning flame MIT, LCS, CRS, or NSA| - Susan Aglukark and Chad Irschick To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message