From owner-freebsd-questions Thu Nov 25 14:41:36 1999 Delivered-To: freebsd-questions@freebsd.org Received: from freesbee.wheel.dk (freesbee.wheel.dk [193.162.159.97]) by hub.freebsd.org (Postfix) with ESMTP id DB30915091 for ; Thu, 25 Nov 1999 14:41:26 -0800 (PST) (envelope-from ncbp@bank-pedersen.dk) Received: by freesbee.wheel.dk (Postfix, from userid 1002) id 7A4A23E2F; Thu, 25 Nov 1999 23:41:25 +0100 (CET) Date: Thu, 25 Nov 1999 23:41:25 +0100 From: "Niels Chr. Bank-Pedersen" To: freebsd-questions@FreeBSD.ORG, Greg Lehey Subject: Re: ping response times over ppp Message-ID: <19991125234125.A23366@bank-pedersen.dk> References: <19991125230609.A23253@bank-pedersen.dk> <19991125173107.16398@mojave.sitaranetworks.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 1.0i In-Reply-To: <19991125173107.16398@mojave.sitaranetworks.com>; from grog@mojave.sitaranetworks.com on Thu, Nov 25, 1999 at 05:31:07PM -0500 Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Thu, Nov 25, 1999 at 05:31:07PM -0500, Greg Lehey wrote: > On Thursday, 25 November 1999 at 23:06:09 +0100, Niels Chr. Bank-Pedersen wrote: > > Hi, > > > > We are doing some testing of some new network equipment, and I've > > stumbled across the following: > > > > 64 bytes from 192.168.10.10: icmp_seq=22 ttl=253 time=210.361 ms > > 64 bytes from 192.168.10.10: icmp_seq=23 ttl=253 time=210.392 ms > > > > All responsetimes equals n*10 + epsilon [ms]. I'm pretty sure we don't have > > any queuing involved that could influence the results, so my question is > > whether this is caused by timeresolution problems within either ping or > > ppp; or I'm just plain lucky to hit n*10 every time? :) > > Sounds like it could be the other end. What's there? I seem to > remember that System V STREAMS can sometimes do things like this. It's a FreeBSD-STABLE as well: FreeBSD freeze.wheel.dk 3.3-STABLE FreeBSD 3.3-STABLE #6: Fri Nov 19 22:03:19 CET 1999 root@freeze.wheel.dk:/usr/src/sys/compile/FREEZE i386 - and it's just a few ethernets away - plus of course the ppp-link (see below). > BTW, for normal ping packets and 33.6 or 56 kb/s, these are *very* > slow times. Actually its ISDN, just not the B-channel :-) > Greg /Niels Chr. -- Niels Christian Bank-Pedersen, NCB1-RIPE. Network Manager, Tele Danmark NET, IP-section. "Hey, are any of you guys out there actually *using* RFC 2549?" To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message