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Re: [rare-dev] RES: How to define explicit paths on Segment Routing


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  • From: mc36 <>
  • To:
  • Subject: Re: [rare-dev] RES: How to define explicit paths on Segment Routing
  • Date: Thu, 13 Oct 2022 16:18:22 +0200

hi,
right now sr-mpls supports a single intermediate in the dataplanes...
from that point, the packet will go on the best-path...
br,
cs


On 9/27/22 17:19, Cristina Klippel Dominicini wrote:

Hi Csaba,

We understand SR-MPLS is a more mature standard than SRv6, and this is
reflected in current protocol implementations. Considering the Tofino data
plane in the latest freeRtr release, could you please clarify the differences
between the SRv6 support and the SR-MPLS support?

This is important for us to define if it is viable to include SRv6 in the
SC22 demo or limit to SR-MPLS only. For SR-MPLS, we understood that we only
support 1 label insertion, while in PolKA we can define explicit paths.

Thank you,
Cristina

________________________________________
De: <> em nome de
mc36 <>
Enviado: quarta-feira, 21 de setembro de 2022 14:25
Para: Marcos Felipe Schwarz; Cristina Klippel Dominicini;
; Frederic LOUI
Cc: Everson Borges; Magnos Martinello
Assunto: Re: [rare-dev] RES: How to define explicit paths on Segment Routing

hi,
talking about the tofino, no, does not.
br,
cs


On 9/21/22 16:55, Marcos Felipe Schwarz wrote:
Hi Csaba,

Would FreeRtr Implementation of SRv6 be able to support longer explicit paths
than the SR-MPLS implementation?

Regards,

Marcos Schwarz

-----Mensagem original-----
De: Cristina Klippel Dominicini <>
Enviada em: quarta-feira, 21 de setembro de 2022 10:35
Para: mc36 <>; ; Frederic LOUI
<>
Cc: Everson Borges <>; Marcos Felipe Schwarz
<>; Magnos Martinello <>
Assunto: Re: How to define explicit paths on Segment Routing


Hi Csaba,

Thank you for the information! So, for the demo, we will try to force some
configuration in the hops to select the desired paths for each scenario the
experiment.

Best regards,
Cristina

________________________________________
De: mc36 <>
Enviado: quarta-feira, 21 de setembro de 2022 04:18
Para: Cristina Klippel Dominicini; ; Frederic LOUI
Cc: Everson Borges; Marcos Schwarz
Assunto: Re: How to define explicit paths on Segment Routing

hi,
excellent question as usual... for sr-mpls we only support 1 label insertion
in the dataplanes at the moment...
br,
cs

On 9/21/22 01:31, Cristina Klippel Dominicini wrote:
Hi Csaba and Frederic,

We are working on the demo for the SuperComputing Conference, which compares
PolKA with Segment Routing.

For this comparison, it would be important to define an explicit path
for both protocols, where all the nodes of the path are explicitly defined,
independently of the shortest path between two nodes, as explained here:

https://www.cisco.com/c/en/us/td/docs/routers/asr9000/software/asr9k-r
6-4/segment-routing/configuration/guide/b-segment-routing-cg-asr9000-6
4x/b-segment-routing-cg-asr9000-64x_chapter_0111.html

Using PolKA, the syntax is simple:
RIO0001#configure terminal
RIO0001(cfg)#interface tunnel1
*RIO0001(cfg-if)#tunnel domain-name 20.20.20.1 20.20.20.4 20.20.20.3
20.20.20.2* RIO0001(cfg-if)#end

However, for Segment Routing we have not been able to define the
explicit path. Could you please confirm if this is supported in the
current implementation of freeRtr? We searched the test cases here,
but we could not identify one that uses explicit paths:
http://docs.freertr.org/guides/reference/
<http://docs.freertr.org/guides/reference/>

Best regards,
Cristina



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________________________________

Esta mensagem (incluindo anexos) cont m informa o confidencial destinada
a um usu rio espec fico e seu conte do protegido por lei. Se voc n o
o destinat rio correto deve apagar esta mensagem.

O emitente desta mensagem respons vel por seu conte do e endere amento.
Cabe ao destinat rio cuidar quanto ao tratamento adequado. A divulga o,
reprodu o e/ou distribui o sem a devida autoriza o ou qualquer outra
a o sem conformidade com as normas internas do Ifes s o proibidas e pass
veis de san o disciplinar, c vel e criminal.



________________________________

Esta mensagem (incluindo anexos) cont m informa o confidencial destinada
a um usu rio espec fico e seu conte do protegido por lei. Se voc n o
o destinat rio correto deve apagar esta mensagem.

O emitente desta mensagem respons vel por seu conte do e endere amento.
Cabe ao destinat rio cuidar quanto ao tratamento adequado. A divulga o,
reprodu o e/ou distribui o sem a devida autoriza o ou qualquer outra
a o sem conformidade com as normas internas do Ifes s o proibidas e pass
veis de san o disciplinar, c vel e criminal.



  • Re: [rare-dev] RES: How to define explicit paths on Segment Routing, mc36, 10/13/2022

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