https://app.knowbase.one/vault/rfc/docid/6230
RFC5710: PathErr Message Triggered MPLS and GMPLS LSP Reroutes
Internet Engineering Task Force (IETF) L. Berger Request for Comments: 5710 LabN Category: Standards Track D. Papadimitriou ISSN: 2070-1721 Alcatel Lucent ...