I have 

reviewed

 this document as part of the security directorate's




ongoing effort to 

review

 all IETF documents being processed by the




IESG.  These comments were written primarily for the benefit of the

security area directors.  Document editors and WG chairs should treat




these comments just like any other last call comments.

This document is about how label switching routers (LSRs) can tell their neighbor not to advertise state about unsupported applications.  This apparently was not thought of originally, and was introduced in RFC 5561.  So this document introduces a way to turn off advertisement of earlier applications (before RFC 5561).




As specified in the security considerations section, this certainly does not introduce any security issues.  If the neighbor doesn't understand the TLV , it will continue to advertise unwanted information, and apparently what was done before this was through configuration.  This document allows explicit advertisement of disinterest in applications before RFC 5561.  This is an improvement over configuration..




There's a lot of awkward English here and there, but i assume it will be fixed by the RFC editor.  For example, in the last line of the abstract




"

 which 

   would have otherwise be advertised over the established LDP session"




"be" should be "been".




Radia