A new Request for Comments is now available in online RFC libraries. RFC 7602 Title: IS-IS Extended Sequence Number TLV Author: U. Chunduri, W. Lu, A. Tian, N. Shen Status: Standards Track Stream: IETF Date: July 2015 Mailbox: uma.chunduri@ericsson.com, wenhu.lu@ericsson.com, albert.tian@ericsson.com, naiming@cisco.com Pages: 12 Characters: 23904 Updates/Obsoletes/SeeAlso: None I-D Tag: draft-ietf-isis-extended-sequence-no-tlv-06.txt URL: https://www.rfc-editor.org/info/rfc7602 DOI: http://dx.doi.org/10.17487/RFC7602 This document defines the Extended Sequence Number TLV to protect Intermediate System to Intermediate System (IS-IS) PDUs from replay attacks. This document is a product of the IS-IS for IP Internets Working Group of the IETF. This is now a Proposed Standard. STANDARDS TRACK: This document specifies an Internet Standards Track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the Official Internet Protocol Standards (https://www.rfc-editor.org/standards) for the standardization state and status of this protocol. 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