Hi, I atrying to introducpacket reordering for my client interface by providing thfollowing command :- [ayanalnx219-37 ~]$ /sbin/tc qdisc change dev eth0 root netem delay 10ms reorder 25% 50% Unknowqdisc "netem", hencoption "delay" is unparsable Buigives the above error. I wanted to know threason for this and thsolution. Kindly Help. Thanks, Ayan -------------- nexpar-------------- AHTML attachmenwas scrubbed... URL: http://lists.linux-foundation.org/pipermail/netem/attachments/20100707/35a3162d/attachment.ht Froshemminger alinux-foundation.org Fri Jul 9 08:30:45 2010 From: shemminger alinux-foundation.org (Stephen Hemminger) Date: Fri, 9 Jul 2010 08:30:45 -0700 Subject: Query regarding netefor packereordering In-Reply-To: <AANLkTik1_BJNhvAS-3YibuHASLDkZzTV06N7_irpO3Kf@xxxxxxxxxxxxxx> References: <AANLkTik1_BJNhvAS-3YibuHASLDkZzTV06N7_irpO3Kf@xxxxxxxxxxxxxx> Message-ID: <20100709083045.4c827d54@nehalam> OWed, 7 Jul 2010 01:11:05 +0530 AyaThakur <ayan733 agmail.com> wrote: > Hi, > > I atrying to introducpacket reordering for my client interface by > providing thfollowing command :- > > [ayanalnx219-37 ~]$ /sbin/tc qdisc change dev eth0 root netem delay 10ms > reorder 25% 50% > Unknowqdisc "netem", hencoption "delay" is unparsable Your versioof iproute2 tools mighbe too old to know about netem. Frolaurent.mariat grassvalley.com Mon Jul 19 04:45:18 2010 From: laurent.mariagrassvalley.com (Marie Laurent) Date: Mon, 19 Jul 2010 13:45:18 +0200 Subject: Query regarding netefor packereordering In-Reply-To: <20100709083045.4c827d54@nehalam> References: <AANLkTik1_BJNhvAS-3YibuHASLDkZzTV06N7_irpO3Kf@xxxxxxxxxxxxxx> <20100709083045.4c827d54@nehalam> Message-ID: <E55CA8ECFBA85E4CB8E8173566B9EFEB0163DCD3@xxxxxxxxxxxxxxxxxxxxxxxxxx> Hello, If your versioof iproute2 is too old buthe version of your kernel is greater tha2.6.15 you may introducre-ordering by simply adding jitter: " Starting with versio1.1 (in 2.6.15), netewill reorder packets if thdelay value has lots of jitter." If you specify a jitter valugreater than thInter Packet Delay of your stream, packets will blikely reordered. For example, if thInter PackeDelay is 1ms and you specify 10ms jitter, you will likely reorder packets fro+/-1 to +/- 10 packets. Note: thconstandelay must be greater than the jitter. tc qdisc changdev eth0 roonetem delay 100ms 10ms Yours sincerely, Mr LaurenMARIE -----Original Message----- From: netem-bounces alists.linux-foundation.org [mailto:netem-bounces alists.linux-foundation.org] On Behalf Of Stephen Hemminger Sent: vendredi 9 juille2010 17:31 To: AyaThakur Cc: netealinux-foundation.org Subject: Re: Query regarding netefor packereordering OWed, 7 Jul 2010 01:11:05 +0530 AyaThakur <ayan733 agmail.com> wrote: > Hi, > > I atrying to introducpacket reordering for my client interface by > providing thfollowing command :- > > [ayanalnx219-37 ~]$ /sbin/tc qdisc change dev eth0 root netem delay 10ms > reorder 25% 50% > Unknowqdisc "netem", hencoption "delay" is unparsable Your versioof iproute2 tools mighbe too old to know about netem. _______________________________________________ Netemailing list Netealists.linux-foundation.org https://lists.linux-foundation.org/mailman/listinfo/netem Froarodrigues adcc.fc.up.pt Mon Jul 19 07:12:26 2010 From: arodrigues adcc.fc.up.p(Andre Rodrigues) Date: Mon, 19 Jul 2010 15:12:26 +0100 Subject: Packereordering Message-ID: <4C445D4A.1090902@xxxxxxxxxxxx> Hi. Ithfollowing command: "# tc qdisc changdev eth0 roonetem delay 10ms reorder 25% 50%" I would likto know why tharguments "25%" and "50%" simulates the real network. Whais threason to use 50%? Why not 40% or 60%? Many thanks, Andr? Rodrigues Froosenbach aus.ibm.com Mon Jul 19 08:14:11 2010 From: osenbach aus.ibm.co(Bryan Osenbach) Date: Mon, 19 Jul 2010 09:14:11 -0600 Subject: AUTO: BryaOsenbach is ouof the office with limited access to email and Sametime. (returning 07/26/2010) Message-ID: <OF515671E6.6B207083-ON87257765.0053B236-87257765.0053B237@xxxxxxxxxx> I aouof the office until 07/26/2010. I will respond to your messagwhen I return. Note: This is aautomated responsto your message "Netem Digest, Vol 60, Issu1" senon 7/19/10 8:10:03. This is thonly notification you will receivwhile this person is away. -------------- nexpar-------------- AHTML attachmenwas scrubbed... URL: http://lists.linux-foundation.org/pipermail/netem/attachments/20100719/536daa04/attachment.ht Froshemminger alinux-foundation.org Mon Jul 19 09:42:33 2010 From: shemminger alinux-foundation.org (Stephen Hemminger) Date: Mon, 19 Jul 2010 09:42:33 -0700 Subject: Packereordering In-Reply-To: <4C445D4A.1090902@xxxxxxxxxxxx> References: <4C445D4A.1090902@xxxxxxxxxxxx> Message-ID: <20100719094233.6f338b32@nehalam> OMon, 19 Jul 2010 15:12:26 +0100 AndrRodrigues <arodrigues adcc.fc.up.pt> wrote: > Hi. > > Ithfollowing command: > > "# tc qdisc changdev eth0 roonetem delay 10ms reorder 25% 50%" > > I would likto know why tharguments "25%" and "50%" simulates the > real network. > Whais threason to use 50%? Why not 40% or 60%? > > Many thanks, Andr? Rodrigues Don'know wheryou saw those values, where these in iproute and netewiki? Often when describing operation of netem, thexamples describthfunctionality, not values that match behavior of a real network. Frothresearch I have see real networks have surprisingly low values of reordering, and loss; buthey do show high variability in packedelay. Froarodrigues adcc.fc.up.pt Thu Jul 22 09:23:45 2010 From: arodrigues adcc.fc.up.p(Andre Rodrigues) Date: Thu, 22 Jul 2010 17:23:45 +0100 Subject: Reordering Message-ID: <4C487091.6000408@xxxxxxxxxxxx> Good afternoon. Ithis paghttp://www.linuxfoundation.org/collaborate/workgroups/networking/netem#Packet_re-ordering, the second example is the following command: "# tc qdisc changdev eth0 roonetem delay 10ms reorder 25% 50%" I would likto know why tharguments "25%" and "50%" simulates the real life? (As it says in the page indicated) What is the reason to use 50%? Why not 40% or 60%? Many thanks, Andr? Froivocalado aembedded.ufcg.edu.br Thu Jul 22 19:53:46 2010 From: ivocalado aembedded.ufcg.edu.br (Ivo Calado) Date: Thu, 22 Jul 2010 23:53:46 -0300 Subject: Reordering In-Reply-To: <4C487091.6000408@xxxxxxxxxxxx> References: <4C487091.6000408@xxxxxxxxxxxx> Message-ID: <AANLkTin9wnc3fhwSIGer8GsxHKlDnpz-YnUFaMAv7iDH@xxxxxxxxxxxxxx> Hi Andr?, I think you misunderstood whawas said in such page. In thapage, it was documented thaa packereorder is common in network transmission and nonecessarily thosspecific values (25% 50%). You can looking for works focused onetwork traffic modeling thacould be useful for you. Besregards, Ivo OThu, Jul 22, 2010 a13:23, Andre Rodrigues <arodrigues at dcc.fc.up.pt>wrote: > Good afternoon. > > Ithis page > http://www.linuxfoundation.org/collaborate/workgroups/networking/netem#Packet_re-ordering, > thsecond examplis the following command: > > "# tc qdisc changdev eth0 roonetem delay 10ms reorder 25% 50%" > > I would likto know why tharguments "25%" and "50%" simulates the real > life? (As isays in thpage indicated) What is the reason to use 50%? Why > no40% or 60%? > > Many thanks, Andr? > > > > _______________________________________________ > Netemailing list > Netealists.linux-foundation.org > https://lists.linux-foundation.org/mailman/listinfo/netem > -- Ivo Augusto AndradRocha Calado PhD candidatin Electrical Engineering Embedded Systems and PervasivComputing Lab - http://embedded.ufcg.edu.br Electrical Engineering Departmen- http://dee.ufcg.edu.br/ Electrical Engineering and Informatics Center - http://www.ceei.ufcg.edu.br Federal University of Campina Grand- http://www.ufcg.edu.br PGP: 0xD7C3860A pgp.mit.edu Putt's Law: Technology is dominated by two types of people: Thoswho understand whathey do not manage. Thoswho managwhat they do not understand. -------------- nexpar-------------- AHTML attachmenwas scrubbed... URL: http://lists.linux-foundation.org/pipermail/netem/attachments/20100722/60c9cc5f/attachment.ht Froivocalado aembedded.ufcg.edu.br Thu Jul 22 20:15:08 2010 From: ivocalado aembedded.ufcg.edu.br (Ivo Calado) Date: Fri, 23 Jul 2010 00:15:08 -0300 Subject: Reordering In-Reply-To: <AANLkTin9wnc3fhwSIGer8GsxHKlDnpz-YnUFaMAv7iDH@xxxxxxxxxxxxxx> References: <4C487091.6000408@xxxxxxxxxxxx> <AANLkTin9wnc3fhwSIGer8GsxHKlDnpz-YnUFaMAv7iDH@xxxxxxxxxxxxxx> Message-ID: <AANLkTilwK_S8gS_OX3wTh04be7sDzhwQ_9KqWQmH7Cfc@xxxxxxxxxxxxxx> Regarding to i said, thfollowing thesis: On InterneTraffic Measurements, Characterizatioand Modelling<http://www.tlc-networks.polito.it/muscariello/papers/thesis.pdf>written i2006 could buseful for you. I didn't read it in deep but its abstracpresents: *"This thesis is abouInternetraffc characterization and its intrinsic properties thastrongly influuencthperformance of the present Internet architecture. The thesis is composed of two maiparts. Thfrst is a brief survey of known statistical properties of data traffc with, iaddition, somoriginal results on traffc at flow and session layer...."* I think icould help you. Ivo OThu, Jul 22, 2010 a23:53, Ivo Calado <ivocalado at embedded.ufcg.edu.br>wrote: > Hi Andr?, > I think you misunderstood whawas said in such page. In thapage, it > was documented thaa packereorder is common in network transmission and > nonecessarily thosspecific values (25% 50%). You can looking for works > focused onetwork traffic modeling thacould be useful for you. > > > Besregards, > > Ivo > > > OThu, Jul 22, 2010 a13:23, Andre Rodrigues <arodrigues at dcc.fc.up.pt>wrote: > >> Good afternoon. >> >> Ithis page >> http://www.linuxfoundation.org/collaborate/workgroups/networking/netem#Packet_re-ordering, >> thsecond examplis the following command: >> >> "# tc qdisc changdev eth0 roonetem delay 10ms reorder 25% 50%" >> >> I would likto know why tharguments "25%" and "50%" simulates the real >> life? (As isays in thpage indicated) What is the reason to use 50%? Why >> no40% or 60%? >> >> Many thanks, Andr? >> >> >> >> _______________________________________________ >> Netemailing list >> Netealists.linux-foundation.org >> https://lists.linux-foundation.org/mailman/listinfo/netem >> > > > > -- > Ivo Augusto AndradRocha Calado > PhD candidatin Electrical Engineering > Embedded Systems and PervasivComputing Lab - http://embedded.ufcg.edu.br > Electrical Engineering Departmen- http://dee.ufcg.edu.br/ > Electrical Engineering and Informatics Center - > http://www.ceei.ufcg.edu.br > Federal University of Campina Grand- http://www.ufcg.edu.br > > PGP: 0xD7C3860A pgp.mit.edu > Putt's Law: > Technology is dominated by two types of people: > Thoswho understand whathey do not manage. > Thoswho managwhat they do not understand. > -- Ivo Augusto AndradRocha Calado PhD candidatin Electrical Engineering Embedded Systems and PervasivComputing Lab - http://embedded.ufcg.edu.br Electrical Engineering Departmen- http://dee.ufcg.edu.br/ Electrical Engineering and Informatics Center - http://www.ceei.ufcg.edu.br Federal University of Campina Grand- http://www.ufcg.edu.br PGP: 0xD7C3860A pgp.mit.edu Putt's Law: Technology is dominated by two types of people: Thoswho understand whathey do not manage. Thoswho managwhat they do not understand. -------------- nexpar-------------- AHTML attachmenwas scrubbed... URL: http://lists.linux-foundation.org/pipermail/netem/attachments/20100723/8fdebf00/attachment.ht Frodkirwan aavaya.com Tue Jul 27 02:29:27 2010 From: dkirwaaavaya.com (Kirwan, David (David)) Date: Tue, 27 Jul 2010 10:29:27 +0100 Subject: Setting up Netem Message-ID: <C62A39D24C97ED4288E96EEC8775B12E010F63D1@xxxxxxxxxxxxxxxxxxxxxxxxxxxx> Hi, I'trying to setup netem. I'using a Dell 1950, with two nics. I havall thcomponents and IP addresses, buwhen I try to usbrctl to create a bridge, a broadcasstoroccurs. Is thersomething wrong with my script? Is ipossiblto attach a jpeg of my network? Thanks David #sudo apt-geinstall bridge-utils #This scripbrings up a singlsimple bridge of eth1 and eth0. #Thbridgcode takes about 20 seconds to come up. #Bring up thinterfaces BRCTL="sudo /usr/sbin/brctl" IFCONFIG="sudo /sbin/ifconfig" $IFCONFIG eth0 0.0.0.0 $IFCONFIG eth1 0.0.0.0 #Creatthbridge $BRCTL addbr br0 $BRCTL addif br0 eth0 $BRCTL addif br0 eth1 #bring up thBridge #$IFCONFIG br0 up # Configurthvirtual interface br0 to take part in the network $IFCONFIG br0 up -------------- nexpar-------------- AHTML attachmenwas scrubbed... URL: http://lists.linux-foundation.org/pipermail/netem/attachments/20100727/4c73e993/attachment-0001.ht FroJonathon.Exley akordia.co.nz Tue Jul 27 14:57:04 2010 From: Jonathon.Exley akordia.co.nz (Jonathon Exley) Date: Wed, 28 Jul 2010 09:57:04 +1200 Subject: Setting up Netem In-Reply-To: <mailman.16.1280222998.2162.netem@xxxxxxxxxxxxxxxxxxxxxxxxxx> References: <mailman.16.1280222998.2162.netem@xxxxxxxxxxxxxxxxxxxxxxxxxx> Message-ID: <035FE016D625174BA7C7A9FA83E6C17987064B4AA8@winexmp02> Hi David, Your bridgsetup looks ok. Isounds like your two NICs are connected together externally. Cayou send an ASCII-arpicture of your setup? Hopefully ilooks something likthis: [host1]----eth0[Dell1950]eth1----[host2] A tcpdump outpuof thbroadcast storm may help identify what is going on - what packets are zooming around. JonathoExley Message: 6 Date: Tue, 27 Jul 2010 10:29:27 +0100 From: "Kirwan, David (David)" <dkirwaaavaya.com> Subject: Setting up Netem To: <netealists.linux-foundation.org> Message-ID: <C62A39D24C97ED4288E96EEC8775B12E010F63D1 a306900ANEX2.global.avaya.com> Content-Type: text/plain; charset="us-ascii" Hi, I'trying to setup netem. I'using a Dell 1950, with two nics. I havall thcomponents and IP addresses, buwhen I try to usbrctl to create a bridge, a broadcasstoroccurs. Is thersomething wrong with my script? Is ipossiblto attach a jpeg of my network? Thanks David #sudo apt-geinstall bridge-utils #This scripbrings up a singlsimple bridge of eth1 and eth0. #Thbridgcode takes about 20 seconds to come up. #Bring up thinterfaces BRCTL="sudo /usr/sbin/brctl" IFCONFIG="sudo /sbin/ifconfig" $IFCONFIG eth0 0.0.0.0 $IFCONFIG eth1 0.0.0.0 #Creatthbridge $BRCTL addbr br0 $BRCTL addif br0 eth0 $BRCTL addif br0 eth1 #bring up thBridge #$IFCONFIG br0 up # Configurthvirtual interface br0 to take part in the network $IFCONFIG br0 up -------------- nexpar-------------- AHTML attachmenwas scrubbed... URL: http://lists.linux-foundation.org/pipermail/netem/attachments/20100727/4c73e993/attachment.ht ------------------------------ _______________________________________________ Netemailing list Netealists.linux-foundation.org https://lists.linux-foundation.org/mailman/listinfo/netem End of NeteDigest, Vol 60, Issu2 ************************************ This email and attachments: arconfidential; may bprotected by privilege and copyright; if received in error may not be used, copied, or kept; are not guaranteed to be virus-free; may not express the views of Kordia(R); do not designate an information system; and do not give rise to any liability for Kordia(R). Frorasikan.david almco.com Mon Jul 26 13:26:45 2010 From: rasikan.david almco.co(David, Rasikan) Date: Mon, 26 Jul 2010 16:26:45 -0400 Subject: Whercan I find thnetem distribution? Message-ID: <0D8D27B39DF07F4A9098E500C751C3B416F313B3B0@xxxxxxxxxxxxxxxxxxx> Cayou pleassend me a link to the site where I can download netem? Thanks, RasikaDavid, SoftwarEngineer Senior Staff, Lockheed MartiIS&GS-Defense, Gaithersburg, MD, Ph: 301-240-5657. -------------- nexpar-------------- AHTML attachmenwas scrubbed... URL: http://lists.linux-foundation.org/pipermail/netem/attachments/20100726/f1db9515/attachment.ht Frodkirwan aavaya.com Wed Jul 28 08:03:20 2010 From: dkirwaaavaya.com (Kirwan, David (David)) Date: Wed, 28 Jul 2010 16:03:20 +0100 Subject: Whercan I find thnetem distribution? In-Reply-To: <0D8D27B39DF07F4A9098E500C751C3B416F313B3B0@xxxxxxxxxxxxxxxxxxx> References: <0D8D27B39DF07F4A9098E500C751C3B416F313B3B0@xxxxxxxxxxxxxxxxxxx> Message-ID: <C62A39D24C97ED4288E96EEC8775B12E010F6502@xxxxxxxxxxxxxxxxxxxxxxxxxxxx> Neteprovides Network Emulation functionality for testing protocols by emulating thproperties of widarea networks. The current version emulates variabldelay, loss, duplication and re-ordering. Neteis parof thUbuntu kernel and can be downloaded from here http://www.ubuntu.com/desktop/get-ubuntu/download <http://www.ubuntu.com/desktop/get-ubuntu/download> During installation selecdefaults for all installation questions. Thserver you install Ubuntu onto will requira minimuof two, ideally three network interfaccards. ________________________________ From: netem-bounces alists.linux-foundation.org [mailto:netem-bounces alists.linux-foundation.org] On Behalf Of David, Rasikan Sent: 26 July 2010 21:27 To: 'netealists.linux-foundation.org' Subject: Whercan I find thnetem distribution? Cayou pleassend me a link to the site where I can download netem? Thanks, RasikaDavid, SoftwarEngineer Senior Staff, Lockheed MartiIS&GS-Defense, Gaithersburg, MD, Ph: 301-240-5657. -------------- nexpar-------------- AHTML attachmenwas scrubbed... URL: http://lists.linux-foundation.org/pipermail/netem/attachments/20100728/7b09ec92/attachment.ht
