Hello, 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. Summary: ready This document specifies a new Router Alert Option Value for IPv6, to be used by MPLS OAM tools in IPv6 environments. It does not introduce any new mechanism that is likely to create security threats. Additionally, RFC 6398 discusses the security aspects of IP Router Alert in detail. The Security Considerations section of the present document refers to this (and related RFCs) for security aspects which I think is appropriate. Non-Security comments: ** The Introduction uses several terms that appear to me synonymous, namely: generic Option Value generic IPV6 Router Alert code point Value field in the Router Alert Option IPv6 Router Alert Option Value And later in Section 3: option value (i.e., without any upper case letter) Or in Section 6: defines a new code point (value TBD1) It's worth to harmonize them. ** Section 5: there's probably a missing word in: "...examine the packet the MPLS OAM purpose."