IS-IS LSP lifetime corruption - Problem Statement

The information below is for an old version of the document
Document Type Expired Internet-Draft (individual)
Authors Bruno Decraene  , Christof Schmitz 
Last updated 2016-01-07 (latest revision 2015-07-06)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


The IS-IS protocol exchanges Link State Packet (LSP) to exchange routing information. The lifetime of this LSP is located in the LSP header and is neither protected from corruption by the Fletcher checksum nor by cryptographic authentication. So the LSP lifetime may be altered, either accidentally or maliciously any time. The lifetime field of the LSP is an important field for the correct operation of IS-IS. Corruption of this LSP lifetime may cause flooding storm with severe impact in the network. This draft documents the problem statement and calls for a solution.


Bruno Decraene (
Christof Schmitz (

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