A new Request for Comments is now available in online RFC libraries. RFC 7419 Title: Common Interval Support in Bidirectional Forwarding Detection Author: N. Akiya, M. Binderberger, G. Mirsky Status: Informational Stream: IETF Date: December 2014 Mailbox: nobo@cisco.com, mbinderb@cisco.com, gregory.mirsky@ericsson.com Pages: 8 Characters: 16944 Updates: RFC 5880 I-D Tag: draft-ietf-bfd-intervals-05.txt URL: https://www.rfc-editor.org/rfc/rfc7419.txt Bidirectional Forwarding Detection (BFD) requires that messages be transmitted at regular intervals and provides a way to negotiate the interval used by BFD peers. Some BFD implementations may be restricted to only support several interval values. When such BFD implementations speak to each other, there is a possibility of two sides not being able to find a common value for the interval to run BFD sessions. This document updates RFC 5880 by defining a small set of interval values for BFD that we call "Common Intervals" and recommends implementations to support the defined intervals. This solves the problem of finding an interval value that both BFD speakers can support while allowing a simplified implementation as seen for hardware-based BFD. It does not restrict an implementation from supporting more intervals in addition to the Common Intervals. This document is a product of the Bidirectional Forwarding Detection Working Group of the IETF. INFORMATIONAL: This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited. This announcement is sent to the IETF-Announce and rfc-dist lists. To subscribe or unsubscribe, see https://www.ietf.org/mailman/listinfo/ietf-announce https://mailman.rfc-editor.org/mailman/listinfo/rfc-dist For searching the RFC series, see https://www.rfc-editor.org/search For downloading RFCs, see https://www.rfc-editor.org/rfc.html Requests for special distribution should be addressed to either the author of the RFC in question, or to rfc-editor@rfc-editor.org. Unless specifically noted otherwise on the RFC itself, all RFCs are for unlimited distribution. The RFC Editor Team Association Management Solutions, LLC