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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 20:13:01 +0200
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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