Last Call Review of draft-ietf-v6ops-v6nd-problems-

Request Review of draft-ietf-v6ops-v6nd-problems
Requested rev. no specific revision (document currently at 05)
Type Last Call Review
Team Security Area Directorate (secdir)
Deadline 2012-02-28
Requested 2012-02-05
Authors Igor Gashinsky, Joel Jaeggli, Warren Kumari
Draft last updated 2012-02-23
Completed reviews Secdir Last Call review of -?? by Brian Weis
Assignment Reviewer Brian Weis
State Completed
Review review-ietf-v6ops-v6nd-problems-secdir-lc-weis-2012-02-23
Review completed: 2012-02-23


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 describes IPv6 Neighbor Discovery (ND) operational problems encountered IPv6 routers. The root issue is the large subnet sizes that are typically used, where a router naively reacting to the discovery of IPv6 addresses within an entire subnet can cause resource exhaustion issues. The document suggests techniques that protocol implementors and operators can employ to mitigate the resource exhaustions.

The document adequately describes the resource exhaustion as a DoS opportunity. The advice itself does not appear to create any new DoS considerations. I believe it is ready to publish.