The IESG has approved the following document: - 'Mobile IPv4 Fast Handovers ' <draft-ietf-mip4-fmipv4-07.txt> as an Experimental RFC This document is the product of the Mobility for IPv4 Working Group. The IESG contact persons are Jari Arkko and Mark Townsley. A URL of this Internet-Draft is: http://www.ietf.org/internet-drafts/draft-ietf-mip4-fmipv4-07.txt Technical Summary The document describes a new protocol designed to reduce the latency and packet loss experienced during handover. It does so by introducing new messages to be used among the Mobile Node (MN), Previous Access Router (PAR) and New Access Router (NAR). The messages allow the MN to establish a binding at the PAR such that packets are forwarded to/from the NAR immediately after a handover. This avoids the long round-trip time to the home network that would be incurred by a standard Mobile IPv4 messsage flow. Working Group Summary The document underwent working group last call in September 2006, and has been actively discussed and edited since then. Issues from the Last Call were resolved in -06, along with the issues from the AD review in -07. Protocol Quality Pete McCann has reviewed this specification as a document shepherd, and Jari Arkko has reviewed this specification for the IESG. Note to RFC Editor Please remove this sentence from the abstract: "Additional mechanisms may be defined in the future versions of this document." Please change in Section 4.2 (first paragraph) OLD: When sent in this "predictive" mode, the fields in the FBU are used as follows: "Home Address" field must be the PCoA (which can be either the Home Address or the co-located CoA) Home Agent field must be set to PAR's IP address Care-of Address field must be the NAR's IP address discovered via PrRtAdv message Destination IP address must be PAR's IP address Source IP address must be the PCoA (which can be either the Home Address or the co-located CoA) NEW: When sent in this "predictive" mode, the fields in the FBU MUST be used as follows: "Home Address" field is the PCoA (which can be either the Home Address or the co-located CoA) Home Agent field is set to PAR's IP address Care-of Address field is the NAR's IP address discovered via PrRtAdv message Destination IP address is the PAR's IP address Source IP address is the PCoA (which can be either the Home Address or the co-located CoA) Please change in Section 4.2 (fourth paragraph, below Figure 1) OLD: When sent in this "reactive" mode, the Destination IP address must be NAR's IP address; NEW: When sent in this "reactive" mode, the Destination IP address MUST be NAR's IP address; Please delete Section 5. Please add this to the end of the Acknowledgment (Section 10): Sending FBU from the new link (i.e., reactive mode) is similar to using the extension defined in [draft-mip4-ro]; however, this document also addresses movement detection and router discovery latencies. Please change in Section 6.1 OLD: Lifetime: The number of seconds remaining before binding expires. MUST NOT exceed 10 seconds. NEW: Lifetime: The number of seconds remaining before binding expires. This value MUST NOT exceed 10 seconds. Please change in Section 8: OLD: The HI and HAck messages need to be secured using a pre-existing security association between the access routers to ensure at least message integrity and authentication, and should also include encryption. NEW: The HI and HAck messages need to be secured using a pre-existing security association between the access routers to ensure at least message integrity and authentication, and should also include encryption. IPsec ESP SHOULD be used. Please change in Section 8 (paragraph 5): OLD: Hence, the extent of this vulnerability is small." NEW: Hence, the extent of this vulnerability is small. It is possible to trace the culprit MN with an established security association at the access router. Please change the last paragraph in Section 3. OLD: .. These delays contribute to the handover performance... NEW: .. These delays contribute to the handover performance. See [fh-ccr] and Chapter 20, Chapter 22 in [mi-book] ... Please add to Section 10: Thanks to Francis Dupont and Hannes Tschofenig for the GEN-ART and TSV-DIR reviews. Please add the following informational references: [fh-ccr] R. Koodli and C. E. Perkins., "Fast Handovers and Context Transfers in Mobile Networks," ACM Computer Communications Review Special Issue on Wireless Extensions to the Internet, October 2001. [mi-book] R. Koodli and C. E. Perkins, "Mobile Internetworking with IPv6: Concepts, Principles and Practices," John Wiley & Sons, June 2007. _______________________________________________ IETF-Announce@ietf.org https://www1.ietf.org/mailman/listinfo/ietf-announce
