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[mc36 <>]

but first, you're measuring with tcp on a 5y+ kernel over a ~5000km tunnel?

On 8/24/22 19:58, mc36 wrote:
> sorry but really that's all what i can do with the info i got... some even 
> more questions...
> and maybe, afterwards, i still will have some even more questions...
>
>
> On 8/24/22 19:56, mc36 wrote:
> > could i ask you kindly to check all the below things please?
> >
> > my first guess is that you're hitting the software forwarder's limits?
> > do you have excessive packets on eth0?
> > then, are the dataplane programmed properly?
> > are the table entries in place and consistent with the polka sho outputs?
> > if not that then do we still have jumbos in the lab?
> >
> > that's the answer: dunno yet... please help me collect the info!
> > thx,
> > cs
> >
> >
> >
> >
> > On 8/24/22 19:47, Everson Borges wrote:
> > > Hi All,
> > >
> > > To explain to you some odd results that I got in my tests with PolKA in the 
> > > P4LAB using iperf3.
> > >
> > > Via the longest path (AMS0001--POZ0001--BUD00001--FRA0001), when I send flows 
> > > from the DTN1 to DTN2, the iperf3 shows off many packet losses by using the 
> > > PolKA tunnel.
> > >
> > > Even though I look in the DTNs to see if they had a problem, I don't find 
> > > anything; nevertheless, when I use SR-MPLS, this problem disappears. So I 
> > > would like to ask if you could
> > > help me sort out this problem?
> > >
> > > One step in investigating the problem was regarding the packet's size; 
> > > however, I have tested different sizes,     from 100 to 1400, and the problem 
> > > keeps happening.
> > >
> > > *Using PolKA Tunnel*
> > > root@ams-bms6:~# iperf3 -c 10.2.101.101 -S 0x20 -b 500M -l 1000
> > > Connecting to host 10.2.101.101, port 5201
> > > [     5] local 10.1.101.101 port 60020 connected to 10.2.101.101 port 5201
> > > [ ID] Interval                        Transfer           Bitrate              
> > >                                     Retr     Cwnd
> > > [     5]      0.00-1.00      sec     2.02 MBytes     17.0 Mbits/sec         0 
> > >         124 KBytes
> > > [     5]      1.00-2.00      sec     6.74 MBytes     56.5 Mbits/sec         0 
> > >         413 KBytes
> > > [     5]      2.00-3.00      sec     17.0 MBytes      143 Mbits/sec      55   
> > >       768 KBytes
> > > [     5]      3.00-4.00      sec     17.7 MBytes      149 Mbits/sec      17   
> > >       604 KBytes
> > > [     5]      4.00-5.00      sec     14.6 MBytes      123 Mbits/sec         0 
> > >         653 KBytes
> > > [     5]      5.00-6.00      sec     15.7 MBytes      131 Mbits/sec         0 
> > >         689 KBytes
> > > [     5]      6.00-7.00      sec     16.2 MBytes      136 Mbits/sec         0 
> > >         708 KBytes
> > > [     5]      7.00-8.00      sec     16.7 MBytes      140 Mbits/sec         0 
> > >         720 KBytes
> > > [     5]      8.00-9.00      sec     16.8 MBytes      141 Mbits/sec         0 
> > >         723 KBytes
> > > [     5]      9.00-10.00     sec     16.9 MBytes      141 Mbits/sec         0 
> > >         723 KBytes
> > > - - - - - - - - - - - - - - - - - - - - - - - - -
> > > [ ID] Interval                        Transfer           Bitrate              
> > >       Retr
> > > [     5]      0.00-10.00     sec      140 MBytes      118 Mbits/sec *72 *     
> > >                       sender
> > > [     5]      0.00-10.02     sec      138 MBytes      116 Mbits/sec           
> > >                               receiver
> > >
> > > iperf Done.
> > >
> > >
> > > *Using SR-MPLS tunnel*
> > > root@ams-bms6:~# iperf3 -c 10.2.101.101 -S 0x40 -b 500M -l 100
> > > Connecting to host 10.2.101.101, port 5201
> > > [     5] local 10.1.101.101 port 60054 connected to 10.2.101.101 port 5201
> > > [ ID] Interval                        Transfer           Bitrate              
> > >                                     Retr     Cwnd
> > > [     5]      0.00-1.00      sec     1.47 MBytes     12.3 Mbits/sec         0 
> > >         110 KBytes
> > > [     5]      1.00-2.00      sec     3.57 MBytes     29.9 Mbits/sec         0 
> > >         264 KBytes
> > > [     5]      2.00-3.00      sec     8.68 MBytes     72.8 Mbits/sec         0 
> > >         635 KBytes
> > > [     5]      3.00-4.00      sec     17.6 MBytes      148 Mbits/sec         0 
> > >      1.48 MBytes
> > > [     5]      4.00-5.00      sec     25.4 MBytes      213 Mbits/sec         0 
> > >      1.72 MBytes
> > > [     5]      5.00-6.00      sec     25.7 MBytes      216 Mbits/sec         0 
> > >      1.72 MBytes
> > > [     5]      6.00-7.00      sec     25.7 MBytes      216 Mbits/sec         0 
> > >      1.72 MBytes
> > > [     5]      7.00-8.00      sec     25.7 MBytes      216 Mbits/sec         0 
> > >      1.72 MBytes
> > > [     5]      8.00-9.00      sec     25.7 MBytes      216 Mbits/sec         0 
> > >      1.72 MBytes
> > > [     5]      9.00-10.00     sec     25.6 MBytes      215 Mbits/sec         0 
> > >      1.72 MBytes
> > > - - - - - - - - - - - - - - - - - - - - - - - - -
> > > [ ID] Interval                        Transfer           Bitrate              
> > >       Retr
> > > [     5]      0.00-10.00     sec      185 MBytes      155 Mbits/sec         0 
> > >                             sender
> > > [     5]      0.00-10.03     sec      184 MBytes      154 Mbits/sec           
> > >                               receiver
> > >
> > > iperf Done.
> > >
> > >
> > > --
> > > Best regards,
> > > Everson
> > > _._,_._,_
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