http://www.rfc-editor.org/rfc/rfc7987.txt
RFC 7987: IS-IS Minimum Remaining Lifetime, L. Ginsberg, P. Wells, B. Decraene, T. Przygienda, H. Gredler2016-10-01T23:00:00-00:00Corruption of the Remaining Lifetime field in a Link State Protocol Data Unit (LSP) can go undetected. In certain scenarios, this may cause or exacerbate flooding storms. It is also a possible denial-of-service attack vector. This document defines a backwards-compatible solution to this problem.