What IPs are you using to test loopback? Did you set up virtual NICs, or just
use 127.0.0.1?
--
Colin Dean
c...@cad.cx
On Monday, November 25, 2013 at 12:41 PM, Robert Clove wrote:
> But in loop back case i am getting approx 70 Gbps rate.
> How to test in loop back?
>
> On Monday, November 25, 2013, Colin Dean wrote:
> > Sorry, this should be going onto the list!
> >
> > Could it be some kind of fault in the NIC?
> >
> > What happens if you set up a loopback test on each machine?
> >
> > E.g. set up another IP on each machine and use it as the client/server, so
> > that all traffic is technically staying on the server. I’m not sure if this
> > would be “optimized out” into simple loopback traffic, though.
> >
> > --
> > Colin Dean
> > c...@cad.cx (javascript:_e({}, 'cvml', 'c...@cad.cx');)
> >
> >
> > On Monday, November 25, 2013 at 10:41 AM, Robert Clove wrote:
> >
> > > Hi Colin,
> > >
> > > Thanks for the reply.
> > > The two servers are exactly of same configuration (hardware and all).
> > > The iptables,ip6tables,firewall are all off.
> > > When i run the iperf no other software runs infact the servers are all
> > > new and they don't have anything other than iperf in them.
> > >
> > > Thanks
> > > Clove
> > >
> > >
> > >
> > > On Mon, Nov 25, 2013 at 8:59 PM, Colin Dean <c...@cad.cx> wrote:
> > > > If I’m analyzing this correctly, I see two servers:
> > > >
> > > > 192.168.30.22
> > > > 192.168.30.3
> > > >
> > > > Tests with .22 as iperf server yield expected results, but tests with
> > > > .3 as the server yield half the expected result.
> > > >
> > > > * Is there any kind of bandwidth monitoring software that could be
> > > > interfering?
> > > > * Any firewall or packet filtering protecting the .3 IP?
> > > > * Is the .3 NIC in the correct duplexing mode?
> > > > * Are the two servers of equivalent hardware? Is the .3 server actually
> > > > capable of generating ~10 Gbps worth of traffic, not just receiving it?
> > > >
> > > >
> > > > --
> > > > Colin Dean
> > > > c...@cad.cx
> > > >
> > > >
> > > > On Monday, November 25, 2013 at 5:16 AM, Robert Clove wrote:
> > > >
> > > >
> > > >
> > > > > Hi All,
> > > > >
> > > > > I am seeing an strange iperf behavior.
> > > > >
> > > > > i have two servers back to back connected via 10Gbps link.
> > > > >
> > > > > Now see the results
> > > > >
> > > > > [root@server1 ~]# iperf -s
> > > > > ------------------------------------------------------------
> > > > > Server listening on TCP port 5001
> > > > > TCP window size: 85.3 KByte (default)
> > > > > ------------------------------------------------------------
> > > > > [ 4] local 192.168.30.22 port 5001 connected with 192.168.30.3 port
> > > > > 39204
> > > > > [ 5] local 192.168.30.22 port 5001 connected with 192.168.30.3 port
> > > > > 39205
> > > > > [ 6] local 192.168.30.22 port 5001 connected with 192.168.30.3 port
> > > > > 39207
> > > > > [ 7] local 192.168.30.22 port 5001 connected with 192.168.30.3 port
> > > > > 39208
> > > > > [ 8] local 192.168.30.22 port 5001 connected with 192.168.30.3 port
> > > > > 39209
> > > > > [ 9] local 192.168.30.22 port 5001 connected with 192.168.30.3 port
> > > > > 39210
> > > > > [ 10] local 192.168.30.22 port 5001 connected with 192.168.30.3 port
> > > > > 39211
> > > > > [ 11] local 192.168.30.22 port 5001 connected with 192.168.30.3 port
> > > > > 39212
> > > > > [ 12] local 192.168.30.22 port 5001 connected with 192.168.30.3 port
> > > > > 39213
> > > > > [ 14] local 192.168.30.22 port 5001 connected with 192.168.30.3 port
> > > > > 39214
> > > > > [ 13] local 192.168.30.22 port 5001 connected with 192.168.30.3 port
> > > > > 39216
> > > > > [ 15] local 192.168.30.22 port 5001 connected with 192.168.30.3 port
> > > > > 39215
> > > > > [ 16] local 192.168.30.22 port 5001 connected with 192.168.30.3 port
> > > > > 39218
> > > > > [ 17] local 192.168.30.22 port 5001 connected with 192.168.30.3 port
> > > > > 39219
> > > > > [ 18] local 192.168.30.22 port 5001 connected with 192.168.30.3 port
> > > > > 39220
> > > > > [ 19] local 192.168.30.22 port 5001 connected with 192.168.30.3 port
> > > > > 39221
> > > > > [ ID] Interval Transfer Bandwidth
> > > > > [ 14] 0.0-10.0 sec 871 MBytes 729 Mbits/sec
> > > > > [ ID] Interval Transfer Bandwidth
> > > > > [ 17] 0.0-10.0 sec 942 MBytes 789 Mbits/sec
> > > > > [ ID] Interval Transfer Bandwidth
> > > > > [ 5] 0.0-10.0 sec 959 MBytes 802 Mbits/sec
> > > > > [ ID] Interval Transfer Bandwidth
> > > > > [ 18] 0.0-10.0 sec 1004 MBytes 839 Mbits/sec
> > > > > [ ID] Interval Transfer Bandwidth
> > > > > [ 4] 0.0-10.0 sec 1020 MBytes 852 Mbits/sec
> > > > > [ ID] Interval Transfer Bandwidth
> > > > > [ 6] 0.0-10.0 sec 838 MBytes 700 Mbits/sec
> > > > > [ ID] Interval Transfer Bandwidth
> > > > > [ 16] 0.0-10.0 sec 863 MBytes 721 Mbits/sec
> > > > > [ ID] Interval Transfer Bandwidth
> > > > > [ 19] 0.0-10.0 sec 836 MBytes 699 Mbits/sec
> > > > > [ ID] Interval Transfer Bandwidth
> > > > > [ 8] 0.0-10.0 sec 384 MBytes 320 Mbits/sec
> > > > > [ ID] Interval Transfer Bandwidth
> > > > > [ 11] 0.0-10.0 sec 536 MBytes 447 M
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > >
> > > >
> > >
> > >
> > >
> > >
> > >
> > >
> >
> >
>
>
>
>
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