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


Chronological Thread 
  • From: mc36 <>
  • To: Cristina Klippel Dominicini <>, "" <>, Frederic LOUI <>
  • Cc: Everson Borges <>, Marcos Schwarz <>
  • Subject: Re: [rare-dev] How to define explicit paths on Segment Routing
  • Date: Wed, 21 Sep 2022 09:18:05 +0200

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-r6-4/segment-routing/configuration/guide/b-segment-routing-cg-asr9000-64x/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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