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


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  • From: mc36 <>
  • To: Everson Borges <>, "" <>
  • Subject: Re: [RARE-users] [freertr] Testing Polka and SRMPLS
  • Date: Wed, 24 Aug 2022 20:35:19 +0200
okk then please check tomorrow if it's software switching, mtu, exporting
bug, or just the distance...


On 8/24/22 20:33, Everson Borges wrote:

As it is here in the middle of the afternoon I didn't realize that it was
already night there, let's leave it for tomorrow.
No problem.

Em qua., 24 de ago. de 2022 s 15:27, mc36 < <>>
escreveu:

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



--
Att.
Everson Scherrer Borges

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