Re: more throughput if using more interfaces per machines ?
Hi,
Following is the hardware config,
--
IBM Netfinity 4500R
+ Dual 733MHz Pentium III processors
+ 1 GB memory
+ 2 10/100 Ethernet interfaces (One integrated and one PXE boot enabled on a
PCI slot)
- 3U size cases
- 5 PCI slots (three 64 bit and two 32 bit),
2 64 bit slots occupied by Intel PRO/1000 MT Dual Port Server Adapter
(
http://www.intel.com/network/connectivity/products/pro1000mt_dual_server_adapter.htm--with that config, can i push out 4Gbps of traffic on the 4 interfaces ?what should my paramaters to iperf be so that all four interfaces are used at once ?- Nirav.----- Original Message -----From: Bruce Lowekamp <lowekamp --at-- CS.WM.EDU>Date: Wednesday, February 11, 2004 6:03 amSubject: Re: more throughput if using more interfaces per machines ?> > I would worry first about getting full bandwidth through one interface.> > That 750Mbps sounds suspiciously close to the full bandwidth of a > 32bit/33MHz PCI bus. If that's what you have, you're never going to get > more no matter how many cards you put on the bus. If you're using > uniprocessor MBs, that's almost certainly what you have. If this is a > good > dual board with PCIX and/or multiple 64bit/64Mhz busses, you should get > more than 750Mbps with one card.> > Bruce Lowekamp> > > --On Tuesday, February 10, 2004 09:32:08 PM -0800 nirav jasapara > <ja
sapara --at-- usc.edu> wrote:> > > Hi Kevin,> >> > Thank you for taking time to answer my queries :)> >> > How do i make the OS ( FreeBSD ) to treat the 4 interfaces as a single> > interface ? I have 4 different ip addresses assigned to each. ( client> > and server )> >> > Any commnad line paramater i can pass to iperf to do the same ?> >> > Thanks,> > Nirav.> >> > ----- Original Message -----> > From: Kevin Gibbs <kgibbs --at-- ncsa.uiuc.edu>> > Date: Monday, February 9, 2004 5:58 pm> > Subject: Re: more throughput if using more interfaces per machines ?> >> >> Your biggest issue here is that you need to make sure the interfaces are> >> acting as one. I believe the term is "binding". Basically you need the> >> OS to treat them as a single interface. It you are binding and getting> >> the same results try using 4 streams with (-P 4). For the UDP tests,> >> are you supplying a desired bandwidth with (-b)??> >>> >> Kevin> >>> >> On Sun, 8 Feb 2004, nirav jasapara wrote:> >>> >> > i am using machi
nes each with 4 Intel 1000BT dual Ethernet cards .> >> >> >> > 1. When i connect two machines ( 1 interface each with a crossover) i> >> gat a thr> >> > oughput of 750 mbps.> >> >> >> > $> iperf -s> >> > $> iperf IP -c> >> >> >> > then when i connected all 4 interfaces with 4 interfaces of the other> >> machines> >> > i was excepting 750*4 Mbps but i got the same 750 Mbps as throughput.> >> What> >> > could> >> > be wrong ? how can i check if the server and client are both using> >> > all> >> the> >> > four> >> > interfaces ?> >> >> >> > 2. While running the same test in UDP mode i got a bandwidth of 1.5> >> > Kbps> >> ? what> >> > could be wrong ?> >> >> >> > - Nirav> >> >> >>> >>> > >