Host Router Support for OSPFv2
RFC 8770, “Host Router Support for OSPFv2”, is a Proposed Standard document published in April 2020 by K. Patel, P. Pillay-Esnault, M. Bhardwaj, S. Bayraktar. It updates RFC 6987. The canonical text is published by the RFC Editor.
Abstract
The Open Shortest Path First Version 2 (OSPFv2) protocol does not have a mechanism for a node to repel transit traffic if it is on the shortest path. This document defines a bit called the Host-bit (H-bit). This bit enables a router to advertise that it is a non-transit router. This document also describes the changes needed to support the H-bit in the domain. In addition, this document updates RFC 6987 to advertise Type 2 External and Not-So-Stubby Area (NSSA) Link State Advertisements (LSAs) (RFC 3101) with a high cost in order to repel traffic effectively.
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
The canonical text of RFC 8770 is hosted at rfc-editor.org. Available in HTML,TXT,PDF,XML.
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