rare-dev - Re: [rare-dev] polka is approaching rare... was: Re: custom crc32 library in freerouter

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Re: [rare-dev] polka is approaching rare... was: Re: custom crc32 library in freerouter

From: mc36 <>
To: , Cristina Klippel Dominicini <>, Frédéric LOUI <>
Cc: Magnos Martinello <>, Rafael Silva Guimarães <>, "Moises R. N. Ribeiro" <>
Subject: Re: [rare-dev] polka is approaching rare... was: Re: custom crc32 library in freerouter
Date: Sat, 6 Nov 2021 12:34:14 +0100

hi,
as there was a lot of questions about it during the last vc, and having shows
is always good,
with
https://github.com/mc36/freeRouter/commit/baa7245013f3eb480b9dc0f8878dfb20ad7903d1
i addes some shows for polka... below the runs from "java -jar rtr.jar test tester
mpls-polka10 wait"
the first two are to query the static configuration of the interfaces with
the polynomials,
this is where each node picks up it's own poly... the last one is the
generated routeid and
decode of it both with poly and crc classes... in the given example, the
tunnel from r1 to r4,
so the nodes are 1,2,3,4, and that's what in the decode... and as discussed,
r1 itself does
not encode anything for himself, and r4 decodes 0 so it'll perform a route
lookup....
regards,
cs

r1#show polka interfaces
interface packet
loopback0 false
ethernet1 true
tunnel1 false
tunnel2 false

r1#show polka interfaces eth1
index deg coeff poly
0 16 00010000 10000000000000000
1 16 00010001 10000000000000001
2 16 00010003 10000000000000011
3 16 00010005 10000000000000101
4 16 00010009 10000000000001001
5 16 0001000f 10000000000001111
6 16 00010011 10000000000010001
7 16 0001001b 10000000000011011
8 16 0001001d 10000000000011101
9 16 0001002b 10000000000101011

r1#show polka routeid tun1
mode routeid
hex 000000000000000000004003fff0401c
poly 10000000000001111111111111100000100000000011100

index coeff poly crc equal
0 00010000 16412 16412 true
1 00010001 65519 65519 true
2 00010003 3 3 true
3 00010005 4 4 true
4 00010009 0 0 true
5 0001000f 67 67 true
6 00010011 1872 1872 true
7 0001001b 1259 1259 true
8 0001001d 1396 1396 true
9 0001002b 10011 10011 true

r1#

On 11/4/21 23:01, Cristina Klippel Dominicini wrote:

Thank you for the instructions, Csaba!

We will study and learn about the freeRouter platform to explore its
features in our use case.

Best regards,
Cristina

________________________________________
De: <> em nome de
mc36 <>
Enviado: quinta-feira, 4 de novembro de 2021 18:42
Para: ; Cristina Klippel Dominicini; FrÃ©dÃ©ric LOUI
Cc: Magnos Martinello; Rafael Silva GuimarÃ£es; Moises R. N. Ribeiro
Assunto: Re: [rare-dev] polka is approaching rare... was: Re: custom crc32
library in freerouter

hi,
to have the environment up and running at your side, just pick up a linux and
install openjdk (java, javac) to it...
then do the following as a regular user:

wget freertr.net/rtr.zip
unzip rtr.zip
cd src
./c.sh
java -jar rtr.jar test tester mpls-polka01 wait

then you can access your virtual routers at
telnet localhost 20001
telnet localhost 20002
telnet localhost 20003

good luck and feel free to ask if you get lost somewhere... :)
thanks,
cs

On 11/4/21 22:16, Cristina Klippel Dominicini wrote:

Hi Csaba,

Thank you very much for the demo on Tuesday! We were really happy to see
PolKA integrated into freeRouter... with PolKA tunnels, PBR, ... and the full
set of features that comes with freeRouter =)

Actions points from our side now:
- install a freeRouter virtual testbed;
- reproduce the demo from Csaba in virtual environment;
- document the changes to integrate PolKA in the repository by checking the
commits;
- reproduce the demo in the RARE testbed (after Frederic applies the
modifications); and
- generate the RFC initial version.

@Jordi, is it possible please to give access to the recordings of the three
last meetings (#0005, #0006 and #0007)? I checked in the youtube channel
(https://www.youtube.com/channel/UCzEhsAYKJs2qSNcjuooxCOg/videos), but they
are not there yet. It would be very helpful to have access to the recordings
to tackle the action points.

Thank you!
Cristina

________________________________________
De: <> em nome de
mc36 <>
Enviado: terÃÂ§a-feira, 2 de novembro de 2021 11:58
Para: ; Cristina Klippel Dominicini; FrÃÂ©dÃÂ©ric
LOUI
Cc: Magnos Martinello; Rafael Silva GuimarÃÂ£es; Moises R. N. Ribeiro
Assunto: Re: [rare-dev] polka is approaching rare... was: Re: custom crc32
library in freerouter

hi,
scroll back on this thread and check out those commits i mentioned...
these two are too far and have much other stuff...
regards,
cs

On 11/2/21 15:53, Cristina Klippel Dominicini wrote:

Hi, Frederic,

No problem. It was good that we have more time to explore the huge (and super
fast) effort Csaba did to include PolKA into freeRouter.

@Csaba, I am comparing these two commits. Are they good references of start
and end of PolKA development?
https://github.com/mc36/freeRouter/compare/04f6a662d44b1e618bcb099346693c4be8e5ed52...41a71b143c2ad63249155711d8e166ab5b11fd0d

Best regards,
Cristina

________________________________________
De: FrÃfÃÂ©dÃfÃÂ©ric LOUI <>
Enviado: terÃfÃÂ§a-feira, 2 de novembro de 2021 11:47
Para:
Cc: Cristina Klippel Dominicini; Magnos Martinello; Rafael Silva
GuimarÃfÃÂ£es; Moises R. N. Ribeiro
Assunto: Re: [rare-dev] polka is approaching rare... was: Re: custom crc32
library in freerouter

My bad, wrongly assumed that the Ã'ÃÂ« S Ã'ÃÂ» in CEST was "S"aving time
like in Daily Saving Time :3

My bad IÃÂ¢EUR(tm)d would put CET from now on !

Le 2 nov. 2021 Ãf 15:23, mc36 <> a ÃfÃÂ©crit :

okk, the meeting room is closed again so let's wait then... :)

On 11/2/21 15:21, mc36 wrote:

hihi,
my bad, frederic really said ceSt in the mail so it's summer time...
anyway if you're in them im going too... :)
regards,
cs
On 11/2/21 15:20, Cristina Klippel Dominicini wrote:

Sorry... the invitation was in CEST and we didn't realize the timezone
change. Jordi opened the VC and explained it.

It's because we're looking forward to the demo :-D

Thanks,
Cristina

________________________________________
De: <> em nome de
mc36 <>
Enviado: terÃffÃ?'Ãf'Ã'ÃÂ§a-feira, 2 de novembro de 2021 11:15
Para: Cristina Klippel Dominicini; Magnos Martinello;
FrÃffÃ?'Ãf'Ã'ÃÂ©dÃffÃ?'Ãf'Ã'ÃÂ©ric LOUI;
Cc: Rafael Silva GuimarÃffÃ?'Ãf'Ã'ÃÂ£es; Moises R. N. Ribeiro
Assunto: Re: [rare-dev] polka is approaching rare... was: Re: custom crc32
library in freerouter

hi,
since we moved to the winter time so you'll have to wait an additional
hour... :)
thanks,
cs

On 11/2/21 15:08, Cristina Klippel Dominicini wrote:

Hi all,

The VC meeting is not opening here... did the timezone change? The invitation
was for 4PM CEST, which is 11AM in Brazil.

Thanks,

Cristina

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
*De:* <> em nome
de Cristina Klippel Dominicini <>
*Enviado:* terÃffÃ?'Ãf'Ã?'ÃffÃÂ¢EURsÃf'Ã'ÃÂ§a-feira, 2 de novembro
de 2021 10:55
*Para:* Magnos Martinello;
FrÃffÃ?'Ãf'Ã?'ÃffÃÂ¢EURsÃf'Ã'ÃÂ©dÃffÃ?'Ãf'Ã?'ÃffÃÂ¢EURsÃf'Ã'ÃÂ©ric
LOUI
*Cc:* ; ; Rafael Silva
GuimarÃffÃ?'Ãf'Ã?'ÃffÃÂ¢EURsÃf'Ã'ÃÂ£es; Moises R. N. Ribeiro
*Assunto:* Re: [rare-dev] polka is approaching rare... was: Re: custom crc32
library in freerouter

That is great, Frederic! :-D

Rafael, Moises and I will join the meeting.

Best regards,

Cristina

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
*De:* Magnos Martinello <>
*Enviado:* segunda-feira, 1 de novembro de 2021 19:05
*Para:*
FrÃffÃ?'Ãf'Ã?'ÃffÃÂ¢EURsÃf'Ã'ÃÂ©dÃffÃ?'Ãf'Ã?'ÃffÃÂ¢EURsÃf'Ã'ÃÂ©ric
LOUI
*Cc:* Cristina Klippel Dominicini; ; ; Rafael
Silva GuimarÃffÃ?'Ãf'Ã?'ÃffÃÂ¢EURsÃf'Ã'ÃÂ£es; Moises R. N. Ribeiro
*Assunto:* Re: [rare-dev] polka is approaching rare... was: Re: custom crc32
library in freerouter
Guys,

We are very happy with the PolKA integration in the free router.

Tomorrow I cannot join the meeting tomorrow at 11 AM,ÃffÃ?'Ãf'ÃÂ¢EURs but
maybe the others will attend the meeting . I am out of Vitoria so if you may
record the call, that will be great.

Cheers

On Mon, 1 Nov 2021 at 18:58,
FrÃffÃ?'Ãf'Ã?'ÃffÃÂ¢EURsÃf'Ã'ÃÂ©dÃffÃ?'Ãf'Ã?'ÃffÃÂ¢EURsÃf'Ã'ÃÂ©ric LOUI
< <>> wrote:

Ãf' Ãf' Ãf' Ãf' Ãf' > @Frederic, is tomorrow freeRouter's meeting
confirmed?
Ãf' Ãf' Ãf' Ãf' Of course ! IIRC, we have planned to have Csaba doing a
RARE/freeRtr Polka demo ÃffÃ?'Ãf'Ã'ÃÂ¢EURÃffÃÂ¢EURsÃf'Ã'ÃÂ¦

Ãf' Ãf' Ãf' Ãf' So I strongly advise the UFES gang :) ton join us !

Ãf' Ãf' Ãf' Ãf' Ãf' > Le 1 nov. 2021 ÃffÃ?'Ãf'Ã?'Ãf' 22:30, Cristina Klippel
Dominicini <
<>> a
ÃffÃ?'Ãf'Ã?'ÃffÃÂ¢EURsÃf'Ã'ÃÂ©crit :
Ãf' Ãf' Ãf' Ãf' Ãf' >
Ãf' Ãf' Ãf' Ãf' Ãf' > Hi Csaba,
Ãf' Ãf' Ãf' Ãf' Ãf' >
Ãf' Ãf' Ãf' Ãf' Ãf' > Thank you very much for your support. We are very
happy with the fast progress of the PolKA integration into freeRouter. We are
now trying to test and exploring your
Ãf' Ãf' Ãf' Ãf' modifications in the freeRouter code to understand how
to contribute.
Ãf' Ãf' Ãf' Ãf' Ãf' > @Frederic, is tomorrow freeRouter's meeting
confirmed? I think it would be a good opportunity to wrap up our current status
and next steps.
Ãf' Ãf' Ãf' Ãf' Ãf' >
Ãf' Ãf' Ãf' Ãf' Ãf' > Regarding the nodeIDs, in the Chinese Remainder
Theorem, it is sufficient if the nodeID polynomials are pairwise relatively
prime (Section 17.4 of
Ãf' Ãf' Ãf' Ãf' https://shoup.net/ntb/ntb-v2.pdf
<https://shoup.net/ntb/ntb-v2.pdf>). For simplicity purposes, we use
irreducible polynomials to assure this condition for any case (similar to
Ãf' Ãf' Ãf' Ãf' prime numbers in the integer arithmetic). Please, find
attached an example table of irreducible polynomials. I refactored the code
and have just submitted a new commit in the
Ãf' Ãf' Ãf' Ãf' shared repository to include the computation of nodeID
polynomials with some examples (a random test and also a test using the
values from the ONDM paper). I added a simple
Ãf' Ãf' Ãf' Ãf' code that tests all the bit possibilities to generate a
list of n irreducible polynomials of a specific degree (for real scenarios, I
believe the best approach is to lookup a
Ãf' Ãf' Ãf' Ãf' precomputed list of nodeids). Please let me know if this
code helps. We still have to produce more mature control plane
functionalities that explore these basic functions.
Ãf' Ãf' Ãf' Ãf' Ãf' >
Ãf' Ãf' Ãf' Ãf' Ãf' > Regarding the design choices, the discussions
with you, Frederic and Jordi, were very helpful to tune our arguments about the
potential benefits of PolKA:
Ãf' Ãf' Ãf' Ãf' Ãf' > - Tables: In the paper, one argument was that
PolKA reduces the number of states by not relying on tables. However, I agree
with you that the use of an almost static table
Ãf' Ãf' Ãf' Ãf' to map the index of the next hops does not discredit the
original argument. Thus, your suggestion to use BGP/IGP for node discovery
and reuse the Segment Routing identifiers
Ãf' Ãf' Ãf' Ãf' seems to be a very good solution. We still reduce the
management burden of maintaining routing tables when compared with
traditional approaches.
Ãf' Ãf' Ãf' Ãf' Ãf' > - Header rewrite: In the paper, one argument was
that PolKA does not need to rewrite the routeid in the packet in each hop.
However, I agree with you that we need to rewrite
Ãf' Ãf' Ãf' Ãf' at least a TTL field and ethernet address to prevent
loops and allow PolKA packets to traverse bridged networks, respectively.
Thus, I think we shouldn't focus on this argument.
Ãf' Ãf' Ãf' Ãf' Ãf' > - Fixed header size: In the paper, we briefly
show that PolKA's pipeline is simpler to implement when compared to a list based
approach, because it does not need to operate
Ãf' Ãf' Ãf' Ãf' over variable headers. As you said, this can be a strong
benefit considering the current hardware limitations in the maximum number of
hops for var header operations, as used
Ãf' Ãf' Ãf' Ãf' in segment routing.
Ãf' Ãf' Ãf' Ãf' Ãf' >
Ãf' Ãf' Ãf' Ãf' Ãf' > From your previous email:
Ãf' Ãf' Ãf' Ãf' Ãf' >>> some more progess here, as you're carrying
ethertype within polka header, i added some mpls over polka test cases... so one can
tunnel mpls vpns (both layer2 and layer3)
Ãf' Ãf' Ãf' Ãf' through a polka domain...
https://github.com/mc36/freeRouter/commit/aa261c3e3a5bf33f85e8068cf7555653f24c4e85
Ãf' Ãf' Ãf' Ãf'
<https://github.com/mc36/freeRouter/commit/aa261c3e3a5bf33f85e8068cf7555653f24c4e85>
Ãf' Ãf' Ãf' Ãf' Ãf' > Nice! We used the Ethernet header as a Proof of
Concept, but we could encapsulate the PolKA header in other protocols if you
think it is more adequate.
Ãf' Ãf' Ãf' Ãf' Ãf' >
Ãf' Ãf' Ãf' Ãf' Ãf' > Best Regards,
Ãf' Ãf' Ãf' Ãf' Ãf' > Cristina
Ãf' Ãf' Ãf' Ãf' Ãf' >
Ãf' Ãf' Ãf' Ãf' Ãf' > ________________________________________
Ãf' Ãf' Ãf' Ãf' Ãf' > De: mc36 < <>>
Ãf' Ãf' Ãf' Ãf' Ãf' > Enviado:
sÃffÃ?'Ãf'Ã?'ÃffÃÂ¢EURsÃf'Ã'ÃÂ¡bado, 30 de outubro de 2021 06:24
Ãf' Ãf' Ãf' Ãf' Ãf' > Para:
<>;
FrÃffÃ?'Ãf'Ã?'ÃffÃÂ¢EURsÃf'Ã'ÃÂ©dÃffÃ?'Ãf'Ã?'ÃffÃÂ¢EURsÃf'Ã'ÃÂ©ric
LOUI
Ãf' Ãf' Ãf' Ãf' Ãf' > Cc: Cristina Klippel Dominicini; Rafael Silva
GuimarÃffÃ?'Ãf'Ã?'ÃffÃÂ¢EURsÃf'Ã'ÃÂ£es; Moises R. N. Ribeiro; Magnos
Martinello
Ãf' Ãf' Ãf' Ãf' Ãf' > Assunto: Re: [rare-dev] polka is approaching
rare... was: Re: custom crc32 library in freerouter
Ãf' Ãf' Ãf' Ãf' Ãf' >
Ãf' Ãf' Ãf' Ãf' Ãf' >>
Ãf' Ãf' Ãf' Ãf' Ãf' >> So basically Polka should be live and kicking in
P4 LAB using RARE/freeRtr ?
Ãf' Ãf' Ãf' Ãf' Ãf' >>
Ãf' Ãf' Ãf' Ãf' Ãf' >> PS: Please let me know if you need P4 dataplane
and bf_forwarder.py to be upgraded.
Ãf' Ãf' Ãf' Ãf' Ãf' >>
Ãf' Ãf' Ãf' Ãf' Ãf' >
Ãf' Ãf' Ãf' Ãf' Ãf' > so yeahhh, the freerouter upgrade does not carry
(at the moment:) the tofino.bin....
Ãf' Ãf' Ãf' Ãf' Ãf' > so well the lab need a fresh bfrouter and
bfforwarder... also, some features needed
Ãf' Ãf' Ãf' Ãf' Ãf' > to be taken out here because we ran out of
stages... at my case it was multicast,
Ãf' Ãf' Ãf' Ãf' Ãf' > as it's a core (P) router here so no need for raw
ip multicast, bier is enough 4 me...
Ãf' Ãf' Ãf' Ãf' Ãf' > attaching the constants table used to configure
my stordis...
Ãf' Ãf' Ãf' Ãf' Ãf' >
Ãf' Ãf' Ãf' Ãf' Ãf' > regards,
Ãf' Ãf' Ãf' Ãf' Ãf' > cs
Ãf' Ãf' Ãf' Ãf' Ãf' >
Ãf' Ãf' Ãf' Ãf' Ãf' > ________________________________
Ãf' Ãf' Ãf' Ãf' Ãf' >
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Ãf' Ãf' Ãf' Ãf' Ãf' > <poly.pdf>

--
---
Magnos Martinello

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sem conformidade com as normas
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conteÃfÃÂºdo ÃfÃÂ© protegido por lei. Se vocÃfÃÂª nÃfÃÂ£o ÃfÃÂ© o
destinatÃfÃÂ¡rio correto deve apagar esta mensagem.

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endereÃfÃÂ§amento.
Cabe ao destinatÃfÃÂ¡rio cuidar quanto ao tratamento adequado. A
divulgaÃfÃÂ§ÃfÃÂ£o, reproduÃfÃÂ§ÃfÃÂ£o e/ou distribuiÃfÃÂ§ÃfÃÂ£o
sem a devida autorizaÃfÃÂ§ÃfÃÂ£o ou qualquer outra aÃfÃÂ§ÃfÃÂ£o sem
conformidade com as normas internas do Ifes sÃfÃÂ£o proibidas e
passÃfÃÂveis de sanÃfÃÂ§ÃfÃÂ£o disciplinar, cÃfÃÂvel e criminal.

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Esta mensagem (incluindo anexos) contÃÂ©m informaÃÂ§ÃÂ£o confidencial
destinada a um usuÃÂ¡rio especÃÂfico e seu conteÃÂºdo ÃÂ© protegido por
lei. Se vocÃÂª nÃÂ£o ÃÂ© o destinatÃÂ¡rio correto deve apagar esta
mensagem.

O emitente desta mensagem ÃÂ© responsÃÂ¡vel por seu conteÃÂºdo e
endereÃÂ§amento.
Cabe ao destinatÃÂ¡rio cuidar quanto ao tratamento adequado. A
divulgaÃÂ§ÃÂ£o, reproduÃÂ§ÃÂ£o e/ou distribuiÃÂ§ÃÂ£o sem a devida
autorizaÃÂ§ÃÂ£o ou qualquer outra aÃÂ§ÃÂ£o sem conformidade com as normas
internas do Ifes sÃÂ£o proibidas e passÃÂveis de sanÃÂ§ÃÂ£o disciplinar,
cÃÂvel e criminal.

________________________________

Esta mensagem (incluindo anexos) contÃ©m informaÃ§Ã£o confidencial destinada
a um usuÃ¡rio especÃfico e seu conteÃºdo Ã© protegido por lei. Se vocÃª nÃ£o
Ã© o destinatÃ¡rio correto deve apagar esta mensagem.

O emitente desta mensagem Ã© responsÃ¡vel por seu conteÃºdo e endereÃ§amento.
Cabe ao destinatÃ¡rio cuidar quanto ao tratamento adequado. A divulgaÃ§Ã£o,
reproduÃ§Ã£o e/ou distribuiÃ§Ã£o sem a devida autorizaÃ§Ã£o ou qualquer outra
aÃ§Ã£o sem conformidade com as normas internas do Ifes sÃ£o proibidas e
passÃveis de sanÃ§Ã£o disciplinar, cÃvel e criminal.

Re: [rare-dev] polka is approaching rare... was: Re: custom crc32 library in freerouter, (continued)

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Re: [rare-dev] polka is approaching rare... was: Re: custom crc32 library in freerouter