Technical Summary
This document describes a BGP based routing solution to establish
end-to-end intent-aware paths across a multi-domain transport
network. The transport network can span multiple service provider
and customer network domains. The BGP intent-aware paths can be used
to steer traffic flows for service routes that need a specific
intent. This solution is called BGP Color-Aware Routing (BGP CAR).
This document describes the routing framework and BGP extensions to
enable intent-aware routing using the BGP CAR solution. The solution
defines two new BGP SAFIs (BGP CAR SAFI and BGP VPN CAR SAFI) for
IPv4 and IPv6. It also defines an extensible NLRI model for both
SAFIs that allow multiple NLRI types to be defined for different use
cases. Each type of NLRI contains key and TLV based non-key fields
for efficient encoding of different per-prefix information. This
specification defines two NLRI types, Color-Aware Route NLRI and IP
Prefix NLRI. It defines non-key TLV types for MPLS label stack,
Label Index and SRv6 SIDs. This solution also defines a new Local
Color Mapping (LCM) Extended Community.
Working Group Summary
The shepherd writeup provides a detailed timeline and explanation
of the WG process. The eventual consensus to publish as
experimental reflects engagement from the WG, the various draft
proponents, the chairs, and the past and present ADs.
Document Quality
There are three implementations reported; see the shepherd
writeup for details.
Personnel
The Document Shepherd for this document is Susan Hares. The Responsible
Area Director is John Scudder.