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Analysis and Minimization of Microloops in Link-state Routing Protocols

Document Type Expired Internet-Draft (rtgwg WG)
Expired & archived
Author Alex D. Zinin
Last updated 2005-10-24
RFC stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Additional resources Mailing list discussion
Stream WG state WG Document
Document shepherd (None)
IESG IESG state Expired
Consensus boilerplate Unknown
Telechat date (None)
Responsible AD (None)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


Link-state routing protocols (e.g. OSPF or IS-IS) are known to converge to a loop-free state within a finite period of time after a change in the topology. It is normal, however, to observe short-term loops during the period of topology update propagation, route recalculation, and forwarding table update, due to the asynchronous nature of link-state protocol operation. This document provides an analysis of formation of such microloops and suggests simple mechanisms to minimize them.


Alex D. Zinin

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)