Carrying SID Algorithm information in PCE-based Networks.

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Last updated 2020-07-03 (latest revision 2019-12-31)
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The Algorithm associated with a prefix Segment-ID (SID) defines the path computation Algorithm used by Interior Gateway Protocols (IGPs). This information is available to controllers such as the Path Computation Element (PCE) via topology learning. This document proposes an approach for informing headend routers regarding the Algorithm associated with each prefix SID used in PCE-computed paths, as well as signalling a specific SID algorithm as a constraint to the PCE.


Alexej Tokar (
Siva Sivabalan (
Mahendra Negi (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)