OSPF Graceful Link Shutdown
RFC 8379, “OSPF Graceful Link Shutdown”, is a Proposed Standard document published in May 2018 by S. Hegde, P. Sarkar, H. Gredler, M. Nanduri, L. Jalil. The canonical text is published by the RFC Editor.
Abstract
When a link is being prepared to be taken out of service, the traffic needs to be diverted from both ends of the link. Increasing the metric to the highest value on one side of the link is not sufficient to divert the traffic flowing in the other direction.
It is useful for the routers in an OSPFv2 or OSPFv3 routing domain to be able to advertise a link as being in a graceful-shutdown state to indicate impending maintenance activity on the link. This information can be used by the network devices to reroute the traffic effectively.
This document describes the protocol extensions to disseminate graceful-link-shutdown information in OSPFv2 and OSPFv3.
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 8379 is hosted at rfc-editor.org. Available in TXT,HTML.
- RFC 8378 Signal-Free Locator/ID Separation Protocol Multicast
- RFC 8380 Directory-Assisted Transparent Interconnection of Lots of Links Encapsulation
- RFC 8377 Transparent Interconnection of Lots of Links : Multi- Topology
- RFC 8381 Transparent Interconnection of Lots of Links : Vendor- Specific RBridge Channel Protocol
- RFC 8376 Low-Power Wide Area Network Overview
- RFC 8382 Shared Bottleneck Detection for Coupled Congestion Control for RTP Media
- RFC 8375 Special-Use Domain 'home.arpa.'
- RFC 8383 Transparent Interconnection of Lots of Links : Address Flush Message