Date: Mon, 10 Nov 2014 12:09:04 -0200 From: Evandro Nunes <evandronunes12@gmail.com> To: Luigi Rizzo <rizzo@iet.unipi.it> Cc: Patrick Tracanelli <eksffa@freebsdbrasil.com.br>, "freebsd-net@freebsd.org" <freebsd-net@freebsd.org>, Mahnaz Talebi <mhnz.talebi@gmail.com> Subject: Re: netmap-ipfw on em0 em1 Message-ID: <CAG4HiT4stMEo9BjFqfCNmd9oHgHfdtmfduaAihX4kqwoCow9hA@mail.gmail.com> In-Reply-To: <CA%2BhQ2%2Bivy2XaddtQMQ=fr5CHt4_cnejt%2BjFZHTcGkyQ8zS25gw@mail.gmail.com> References: <CABfVBTktfLGacJ3PerR%2BgTewbS%2B52Vmno9mcT-XQBNktPFw5%2Bw@mail.gmail.com> <CAG4HiT7qery5wEevFUS2bb=91tyF77ZmTdZL0WUi3APCcCYT4Q@mail.gmail.com> <9C799778-79DC-4D5F-BA5C-EA94A573ED10@freebsdbrasil.com.br> <CAG4HiT4UK2tyj%2B0ggjNAfY35oG=zHPW5%2BKXtCyUBn-vPPpCWhg@mail.gmail.com> <CAG4HiT7_3p2f=XLqzr0DYyRsL2R8S0opXKkBHAPH%2B9c8kcw_Jg@mail.gmail.com> <CA%2BhQ2%2Bivy2XaddtQMQ=fr5CHt4_cnejt%2BjFZHTcGkyQ8zS25gw@mail.gmail.com>
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On Sun, Nov 9, 2014 at 9:23 PM, Luigi Rizzo <rizzo@iet.unipi.it> wrote: > > > On Sun, Nov 9, 2014 at 1:17 PM, Evandro Nunes <evandronunes12@gmail.com> > wrote: > >> professor luigi >> >> where can I find the code for netmap-fwd you mentioned on usenix paper? >> >> > =E2=80=8Bthat has been renamed to bridge.c > > cheers > luigi > so it does not actually forwards ip packets, does bridging in fact other than OVS and click is there something to forward l3 packets? > =E2=80=8B > > >> >> ** >> https://www.usenix.org/system/files/conference/atc12/atc12-final186.pdf >> >> On Sun, Nov 9, 2014 at 5:31 PM, Evandro Nunes <evandronunes12@gmail.com> >> wrote: >> >>> hello again patrick >>> >>> On Sun, Nov 9, 2014 at 12:54 AM, Patrick Tracanelli < >>> eksffa@freebsdbrasil.com.br> wrote: >>> >>>> > (Machine-A)<-->Machine-B<--->(MachineC) >>>> > >>>> > Machine-A: >>>> > em0 172.16.251.3/24 >>>> > >>>> > Machine-B: >>>> > em1: 172.16.251.1/24 >>>> > em2: 172.16.252.1/24 >>>> > 10.0-STABLE w/ latest netmap-ipfw and netmap code from google code >>>> > repository >>>> > >>>> > Machine-C: >>>> > em0 172.16.252.3/24 >>>> >>>> Now, your scenario is a typical routing topology. kipfw has no packet >>>> forwarding capabilities whats why when you start it, you are out of >>>> forwarding capabilities and therefore, out of communication between ma= chine >>>> A and C because they just need it in your topology. >>>> >>>> So for your testing purposes read again what Mahaza said: >>>> >>>> >> ipfw works as a bridge and copy >>>> >> incoming packets to em0 to em1 if they pass defined rules (and vice >>>> versa, >>>> >> from em1 to em0). >>>> >>>> Got it? kipfw will work as a BRIDGE and COPY between the NIC ports. >>>> >>>> Therefore on your topology do a simple change: >>>> >>>> Machine-C: >>>> ifconfig em0 172.16.251.4/24 >>>> >>>> So machine C will be in the same network of machine A. >>>> >>>> WITHOUT kipfw you will be OUT of communication. If you want to have >>>> communication without kipfw please configure if_bridge(4) properly. >>>> >>>> Now WHEN you ./kipfw netmap:em1 netmap:em2 you will BRIDGE em1 and em2 >>>> ports and therefore you will HAVE communication between the NICS. >>>> >>>> And you are done, just as a miracle! Thanks to Luigi. >>>> >>> >>> YES IT WORKED YES >>> thank you VERY MUCH for the kind help and for making it clear all the >>> stuff I missed reading, yes I assume I should have read more or at leas= t >>> understood >>> now I can see how the things works and it does work >>> >>> THANK YOU again very much >>> >>> >>> >>>> Now its time to have some fun: >>>> >>>> ipfw/ipfw add pipe 1 all from 172.16.251.0/24 to 172.16.251.0/24 >>>> ipfw/ipfw <http://172.16.251.0/24ipfw/ipfw>; pipe 1 config bw 128Kbit/s >>>> delay 300 >>>> >>>> and now ping machine-A and machine-C and see dummynet working as >>>> expected... >>>> >>>> I believe you can keep on with your testings now!!! :-) >>>> >>> >>> yes it worked as well >>> >>> now let me ask you all, other than click, does netmap offers something >>> that can do packet forwarding? simple packet forwarding like the scenar= io I >>> was trying before? I know this is not kipfw and not bridge but is there >>> something? >>> >>> thank you >>> >>> >>> >>>> BTW Luigi, I see netmap was commited to GENERIC on -CURRENT. I believe >>>> it may be a good idea to add netmap-ipfw to the base system now, to bo= th >>>> promote more testing and also to be a good companion to netmap on GENE= RIC. >>>> I dont mean a new ipfw-netmap binary under /sbin/ but just the code on >>>> /usr/src/tools/tools. >>>> >>> >>> yes and some handbook or a better README that at least mentions the >>> correct syntax for the tools >>> I think adrian chadd mentioned something about that in an earlier messa= ge >>> >>> >>>> >>>> I've been using netmap-ipfw for a while and sure it lacks more >>>> flexbility like the ability to kipfw several ports, etc. But as it is = right >>>> now, it's very stable and reliable for a preliminary code. Thats why I >>>> believe it should be on the base system. Thank you very much for the >>>> incredible technology. >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>> >> > > > -- > -----------------------------------------+------------------------------- > Prof. Luigi RIZZO, rizzo@iet.unipi.it . Dip. di Ing. dell'Informazione > http://www.iet.unipi.it/~luigi/ . Universita` di Pisa > TEL +39-050-2211611 . via Diotisalvi 2 > Mobile +39-338-6809875 . 56122 PISA (Italy) > -----------------------------------------+------------------------------- >
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