The IESG has approved the following document: - 'Carrying SR-Algorithm in Path Computation Element Communication Protocol (PCEP)' (draft-ietf-pce-sid-algo-29.txt) as Proposed Standard
This document is the product of the Path Computation Element Working Group. The IESG contact persons are Gunter Van de Velde, Jim Guichard and Ketan Talaulikar. A URL of this Internet-Draft is: https://datatracker.ietf.org/doc/draft-ietf-pce-sid-algo/ Technical Summary This document specifies extensions to the Path Computation Element Communication Protocol (PCEP) to enhance support for Segment Routing (SR) with a focus on the use of Segment Identifiers (SIDs) and SR- Algorithms in Traffic Engineering (TE). The SR-Algorithm associated with a SID defines the path computation algorithm used by Interior Gateway Protocols (IGPs). This document introduces extensions in three main areas. Mechanisms for informing PCEP peers about the SR-Algorithm associated with SIDs by encoding this information in Explicit Route Object (ERO) and Record Route Object (RRO) subobjects. This document updates RFC 8664 and RFC 9603 to allow such extension. The document specifies SR-Algorithm constraint, enabling refined path computations that can leverage IGP algorithm logic, including Flexible Algorithms, and their associated constraints and optimization metrics. It defines new metric types for the METRIC object required to support SR-Algorithm based path computation, but also applicable to Label Switched Paths (LSPs) setup using different Path Setup Types. Working Group Summary There was broad consensus on this document and no controversies. The concept of "Subobject Extension Block' was introduced in the document late in the process, but these changes were presented to the WG and discussed on the mailing list to reconfirm consensus. Document Quality The document is of good quality and involved active contributions and reviews by implementers. There are at least two known implementations as captured in the document. There was cross-review from LSR WG participants on aspects related to the Flexible Algorithm that this work leverages. The document has also received reviews from the RTG, OPS, and SEC directorates. Document does not contain, YANG, MIB, media types, etc. to warrant those reviews. Personnel The Document Shepherd for this document is Dhruv Dhody. The Responsible Area Director is Ketan Talaulikar. _______________________________________________ Pce mailing list -- [email protected] To unsubscribe send an email to [email protected]
