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Re: [RARE-users] [freertr] Testing Polka and SRMPLS


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  • From: mc36 <>
  • To: Everson Borges <>, Frédéric LOUI <>, "" <>
  • Subject: Re: [RARE-users] [freertr] Testing Polka and SRMPLS
  • Date: Wed, 24 Aug 2022 20:27:38 +0200
ohhh, and always check the eth0 first :)

On 8/24/22 20:27, mc36 wrote:
and you know the display interface traffic trick :)

On 8/24/22 20:25, mc36 wrote:
so everson please understand that it's 21pm here, and you already got the
answer.
please please do the steps one by one from my first mail first, and if all
negative then use the udp flood mode!


On 8/24/22 20:13, mc36 wrote:
fl, please read the thread's last some mails and help everson figure out the
direction! thx!

On 8/24/22 20:10, Everson Borges wrote:
Any measurement I do via tcp has packet loss.

root@ams-bms6:~# iperf3 -c 10.2.101.101 -S 0x20
Connecting to host 10.2.101.101, port 5201
[ 5] local 10.1.101.101 port 60074 connected to 10.2.101.101 port 5201
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 1.10 MBytes 9.21 Mbits/sec 0 83.4
KBytes
[ 5] 1.00-2.00 sec 2.17 MBytes 18.2 Mbits/sec 0 171
KBytes
[ 5] 2.00-3.00 sec 4.10 MBytes 34.4 Mbits/sec 0 346
KBytes
[ 5] 3.00-4.00 sec 9.08 MBytes 76.2 Mbits/sec 0 703
KBytes
[ 5] 4.00-5.00 sec 13.8 MBytes 115 Mbits/sec 0 1.40
MBytes
[ 5] 5.00-6.00 sec 17.5 MBytes 147 Mbits/sec *35* 1.21 MBytes
[ 5] 6.00-7.00 sec 18.8 MBytes 157 Mbits/sec 0 1.33
MBytes
[ 5] 7.00-8.00 sec 20.0 MBytes 168 Mbits/sec 0 1.41
MBytes
[ 5] 8.00-9.00 sec 15.0 MBytes 126 Mbits/sec *69* 1.06 MBytes
[ 5] 9.00-10.00 sec 15.0 MBytes 126 Mbits/sec 0 1.12
MBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 116 MBytes 97.7 Mbits/sec *104*
sender
[ 5] 0.00-10.04 sec 115 MBytes 95.7 Mbits/sec
receiver

iperf Done.

Em qua., 24 de ago. de 2022 s 15:02, mc36 < <>>
escreveu:

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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--
Att.
Everson Scherrer Borges

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