Date: Sun, 3 Nov 2002 22:02:33 -0800 From: "Max Clark" <max@mailution.net> To: "'Dan Nelson'" <dnelson@allantgroup.com> Cc: <freebsd-questions@FreeBSD.ORG> Subject: RE: How to simulate high latency links? Message-ID: <001a01c283c7$c4b78fd0$6445a8c0@princess> In-Reply-To: <20021104020515.GB63929@dan.emsphone.com>
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So if I want to do testing between machine A and B I can route all of the traffic trough a machine C with dummynet and simulate the network environment that I need? Basically I want to test/experiment with the send/receive settings within the servers. What about a hardware appliance? Could this be set up using a QOS policy or something similar with a switch? Thanks for the advice. Max -----Original Message----- From: owner-freebsd-questions@FreeBSD.ORG [mailto:owner-freebsd-questions@FreeBSD.ORG] On Behalf Of Dan Nelson Sent: Sunday, November 03, 2002 6:05 PM To: Max Clark Cc: freebsd-questions@FreeBSD.ORG Subject: Re: How to simulate high latency links? In the last episode (Nov 03), Max Clark said: > Hi, > > I am looking for a way to do some performance testing/tuning in a lab > environment. I have a high latency low speed link (T1/200MS) that I need > to replicate. > > Are there any ways to do this with FreeBSD? dummynet is what you want. By redirecting traffic through a dummynet pipe with ipfw, you can simulate latency and packet loss. See the ipfw and dummynet manpages. -- Dan Nelson dnelson@allantgroup.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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