Signaling Entropy Label Capability and Entropy Readable Label Depth Using OSPF
RFC 9089

Received changes through RFC Editor sync (created alias RFC 9089, changed abstract to 'Multiprotocol Label Switching (MPLS) has defined a mechanism to load-balance traffic flows using Entropy Labels (EL).  An ingress Label Switching Router (LSR) cannot insert ELs for packets going into a given Label Switched Path (LSP) unless an egress LSR has indicated via signaling that it has the capability to process ELs, referred to as the Entropy Label Capability (ELC), on that LSP.  In addition, it would be useful for ingress LSRs to know each LSR's capability for reading the maximum label stack depth and performing EL-based load-balancing, referred to as Entropy Readable Label Depth (ERLD).  This document defines a mechanism to signal these two capabilities using OSPFv2 and OSPFv3, and Border Gateway Protocol - Link State (BGP-LS).', changed pages to 8, changed standardization level to Proposed Standard, changed state to RFC, added RFC published event at 2021-08-14, changed IESG state to RFC Published)