From owner-freebsd-net Wed Jun 21 20:59:10 2000 Delivered-To: freebsd-net@freebsd.org Received: from whizzo.transsys.com (whizzo.TransSys.COM [144.202.42.10]) by hub.freebsd.org (Postfix) with ESMTP id DE5EA37B7E2 for ; Wed, 21 Jun 2000 20:59:06 -0700 (PDT) (envelope-from louie@whizzo.transsys.com) Received: from whizzo.transsys.com (localhost.transsys.com [127.0.0.1]) by whizzo.transsys.com (8.9.3/8.9.1) with ESMTP id XAA35435; Wed, 21 Jun 2000 23:59:04 -0400 (EDT) (envelope-from louie@whizzo.transsys.com) Message-Id: <200006220359.XAA35435@whizzo.transsys.com> X-Mailer: exmh version 2.1.1 10/15/1999 To: Garrett Wollman Cc: freebsd-net@FreeBSD.ORG X-Image-URL: http://www.transsys.com/louie/images/louie-mail.jpg From: "Louis A. Mamakos" Subject: Re: Using timestamp option of ip header (IPOPT_TS) References: <200006220225.WAA35025@whizzo.transsys.com> <200006220343.XAA42436@khavrinen.lcs.mit.edu> In-reply-to: Your message of "Wed, 21 Jun 2000 23:43:40 EDT." <200006220343.XAA42436@khavrinen.lcs.mit.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Wed, 21 Jun 2000 23:59:04 -0400 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. Yeah, the second became well-known in the early MBONE days where source routed packets were used before IP-in-IP tunnels were used to construct the virtual topology. But the first and the third are just broken. I'm not surprised (little surprises me any more), but mostly disappointed. I'll have to make sure our lab guys add these things to their performance tests. louie To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message