This document describes the AEGIS-128L, AEGIS-256, AEGIS-128X, and AEGIS-256X AES-based authenticated encryption with associated data (AEAD) algorithms, which are designed for high-performance applications. Beyond providing confidentiality and integrity for a message together with associated data, the specification also defines how each variant can be used as a stream cipher and as a message authentication code (MAC). The family targets fast software implementations on platforms with AES hardware support, offering several parameter sets that trade off state size, throughput, and key length. It is published in the IRTF stream by the Crypto Forum Research Group (CFRG).
By its name, this RFC specifies a mechanism for OSPF to advertise links that are unreachable or otherwise unusable, rather than simply omitting them from the link-state database. Making such links explicitly visible probably lets other routers and controllers reason about topology that is administratively or operationally down, which is useful for traffic engineering, path computation, and consistent network views. The precise encoding, applicability to OSPFv2/OSPFv3, and backward-compatibility considerations should be confirmed against the official Abstract, which was not reachable on this run; this summary is written from the title and is approximate. It will be grounded from the document's Abstract on the next run.