Carrying Binding Label/SID in PCE-Based Networks
RFC 9604, “Carrying Binding Label/SID in PCE-Based Networks”, is a Proposed Standard document published in August 2024 by S. Sivabalan, C. Filsfils, J. Tantsura, S. Previdi, C. Li. It has since been updated by RFC 9756. The canonical text is published by the RFC Editor.
Abstract
In order to provide greater scalability, network confidentiality, and service independence, Segment Routing (SR) utilizes a Binding Segment Identifier (BSID), as described in RFC 8402. It is possible to associate a BSID to an RSVP-TE-signaled Traffic Engineering (TE) Label Switched Path (LSP) or an SR TE path. The BSID can be used by an upstream node for steering traffic into the appropriate TE path to enforce SR policies. This document specifies the concept of binding value, which can be either an MPLS label or a Segment Identifier (SID). It further specifies an extension to Path Computation Element Communication Protocol (PCEP) for reporting the binding value by a Path Computation Client (PCC) to the Path Computation Element (PCE) to support PCE-based TE policies.
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
The canonical text of RFC 9604 is hosted at rfc-editor.org. Available in HTML,TXT,PDF,XML.
- RFC 9603 Path Computation Element Communication Protocol Extensions for IPv6 Segment Routing
- RFC 9605 Secure Frame : Lightweight Authenticated Encryption for Real-Time Media
- RFC 9602 Segment Routing over IPv6 Segment Identifiers in the IPv6 Addressing Architecture
- RFC 9606 DNS Resolver Information
- RFC 9601 Propagating Explicit Congestion Notification across IP Tunnel Headers Separated by a Shim
- RFC 9607 RTP Payload Format for the Secure Communication Interoperability Protocol Codec
- RFC 9600 TRansparent Interconnection of Lots of Links : Explicit Congestion Notification Support
- RFC 9608 No Revocation Available for X.509 Public Key Certificates