RARE user and assistance email list

[mc36 <>]

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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