A Framework for Loop-Free Convergence
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From: The IESG <firstname.lastname@example.org> To: IETF-Announce <email@example.com> Cc: Internet Architecture Board <firstname.lastname@example.org>, RFC Editor <email@example.com> Subject: Document Action: 'A Framework for Loop-free Convergence' to Informational RFC The IESG has approved the following document: - 'A Framework for Loop-free Convergence ' <draft-ietf-rtgwg-lf-conv-frmwk-07.txt> as an Informational RFC This document is the product of the Routing Area Working Group. The IESG contact persons are Ross Callon and Adrian Farrel. A URL of this Internet-Draft is: http://www.ietf.org/internet-drafts/draft-ietf-rtgwg-lf-conv-frmwk-07.txt
Technical Summary A micro-loop is a packet forwarding loop which may occur transiently among two or more routers in a hop by hop packet forwarding paradigm. This framework provides a summary of the causes and consequences of micro-loops and enables the reader to form a judgement on whether micro-looping is an issue that needs to be addressed in specific networks. It also provides a survey of the currently proposed mechanisms that may be used to prevent or to suppress the formation of micro-loops when an IP or MPLS network undergoes topology change due to failure, repair or management action. When sufficiently fast convergence is not available and the topology is susceptible to micro-loops, use of one or more of these mechanisms may be desirable. Working Group Summary No controversy reported (see PROTO writeup by John Scudder). This document has been evolving since 2006 and reflects a good summary of the approaches explored by the WG. Document Quality The document is a framework intended as an Informational RFC and does not specify a protocol. It has received reasonable review from WG members, and has been updated in response to Gen-ART comments by Ben Campbell as well as IETF last call and IESG comments. Personnel John Scudder is the Document Shepherd for this document. Ross Callon is the Responsible Area Director.