Technical Summary
This document specifies extensions to IS-IS Prefix attribute
advertisement to indicate whether or not a prefix is Entropy
Label Capable (ELC), i.e., eligible for entropy label processing.
Additionally, a new MSD type is defined to advertise the Entropy
Readable Label Depth (ERLD). The ELRD will be advertised using the
existing Maximum SID Depth (MSD) encodings defined in RFC 8476.
Finally, the mapping of these extensions to existing BGP-LS encodigs
is specified.
Working Group Summary
The draft went through multiple iterations due to a change in
requirements. Originally, the ELC was a node-level attribute. However,
a Service Provider (SP) use case relating to external prefix
advertisement required per-prefix advertisement. A second change was
required when the BGP-LS encodings specification was incorporated into
the draft. Since this incorporation obviated the BGP-LS draft, a sixth
author was added.
Document Quality
This document has been a WG document over 4 years. While it has gone
through several iterations, we are now confident that it is ready
for publication.
Personnel
Acee Lindem is the Document Shepherd.
Alvaro Retana is the Responsible Area Director.