Date: Thu, 22 Apr 2004 17:50:25 +0200 From: Lars Eggert <lars.eggert@netlab.nec.de> To: Luigi Rizzo <rizzo@icir.org> Cc: net@freebsd.org Subject: Re: simulating an LFN over 1Gb LAN Ethernet? Message-ID: <4087E9C1.1010907@netlab.nec.de> In-Reply-To: <20040422072920.A26354@xorpc.icir.org> References: <003301c42875$ccd62f10$df5561d9@ALFA> <20040422072920.A26354@xorpc.icir.org>
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[-- Attachment #1 --] Luigi Rizzo wrote: > On Thu, Apr 22, 2004 at 04:26:26PM +0200, Heinz Knocke wrote: >> >> I'd like to simulate an LFN over LAN - my idea is to install >> testing software on 2 hosts, traffic between them would be routed >> by the 3rd one - a FreeBSD based router. To simulate long RTT the >> router would have to delay packet forwarding in at least one >> direction - does anyone know how to do it? Is it at all possible >> withou some changes in kernel source code? > > http://info.iet.unipi.it/~luigi/ip_dummynet/ Dummynet is great, but at Gigabit speeds it has issues with regard to preservation of packet inter-arrival spacing. That may or may not be a problem for what you are trying to simulate however. Lars -- Lars Eggert NEC Network Laboratories [-- Attachment #2 --] 0 *H 01 0 + 0 *H 0?0 0 *H 01 0 UZA10U Western Cape10U Cape Town10U Thawte Consulting1(0&U Certification Services Division1$0"UThawte Personal Freemail CA1+0) *H personal-freemail@thawte.com0 030717000000Z 130716235959Z0b1 0 UZA1%0#U Thawte Consulting (Pty) Ltd.1,0*U#Thawte Personal Freemail Issuing CA00 *H 0 Ħ<UsUNʙZ hup [v :aQP 0cZ,p+Z?qV˯< 6$*+w=+>@dקe*TH<a@ dr` 00U 0 0CU <0:08642http://crl.thawte.com/ThawtePersonalFreemailCA.crl0 U 0)U "0 0 10UPrivateLabel2-1380 *H HP . fgCL!6 -6/ P p<ab:~ t%Pb'qW%ݩ9 Oe_N4[5MwV!x!5$ F]_eO0Z0à S0 *H 0b1 0 UZA1%0#U Thawte Consulting (Pty) Ltd.1,0*U#Thawte Personal Freemail Issuing CA0 031215123128Z 041214123128Z010 UEggert1 0 U*Lars10U Lars Eggert1(0& *H lars.eggert@netlab.nec.de1"0 *H lars.eggert@gmx.net0"0 *H 0 ֦|f(9}r*:kND N (;1Yf-,4qRY To$R v @%vRD8(m W yڲDYv!Pi,),L4 d=kU胏wH >$:1= m.O)/]%әzLʶrm iD-I8;>?X#%|sŷ87(7)wt;#Ǘ3<'G^[ w0u0*+e!0 00L2uMyffBNUbNJJcdZ2s09U 200lars.eggert@netlab.nec.delars.eggert@gmx.net0 U 0 0 *H x+t> KXₜ#x %v~ Q3%,㉣='Ƙcki T|dE^k;xub!lD?948'(јgEݨlާ 6ѽtUVcnqHb5-u0Z0à S0 *H 0b1 0 UZA1%0#U Thawte Consulting (Pty) Ltd.1,0*U#Thawte Personal Freemail Issuing CA0 031215123128Z 041214123128Z010 UEggert1 0 U*Lars10U Lars Eggert1(0& *H lars.eggert@netlab.nec.de1"0 *H lars.eggert@gmx.net0"0 *H 0 ֦|f(9}r*:kND N (;1Yf-,4qRY To$R v @%vRD8(m W yڲDYv!Pi,),L4 d=kU胏wH >$:1= m.O)/]%әzLʶrm iD-I8;>?X#%|sŷ87(7)wt;#Ǘ3<'G^[ w0u0*+e!0 00L2uMyffBNUbNJJcdZ2s09U 200lars.eggert@netlab.nec.delars.eggert@gmx.net0 U 0 0 *H x+t> KXₜ#x %v~ Q3%,㉣='Ƙcki T|dE^k;xub!lD?948'(јgEݨlާ 6ѽtUVcnqHb5-u1;070i0b1 0 UZA1%0#U Thawte Consulting (Pty) Ltd.1,0*U#Thawte Personal Freemail Issuing CA S0 + 0 *H 1 *H 0 *H 1 040422155025Z0# *H 1gqL[C0R *H 1E0C0 *H 0*H 0 *H @0+0 *H (0x +71k0i0b1 0 UZA1%0#U Thawte Consulting (Pty) Ltd.1,0*U#Thawte Personal Freemail Issuing CA S0z *H 1ki0b1 0 UZA1%0#U Thawte Consulting (Pty) Ltd.1,0*U#Thawte Personal Freemail Issuing CA S0 *H _ rv(,r n2 Լ*1s#q'{)ߚK(+̖n>$+ab@7 EcZ[i]zDH-WGHTBj*=BI((0N,avc߳zvU`0c3Mt||2 ".'7v J]g[}h&}[0cP=3_e?AG8ˍM<;F>U8Kz<}~=2[n^
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