-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi, all, I've reviewed this document as part of the transport area directorate's ongoing effort to review key IETF documents. These comments were written primarily for the transport area directors, but are copied to the document's authors for their information and to allow them to address any issues raised. The authors should consider this review together with any other last-call comments they receive. Please always CC tsv-dir@xxxxxxxx if you reply to or forward this review. The primary purpose of the document is to extend fast handover (FMIPv6) [RFC5568] for Mobile IPv6 (MIPv6) [RFC3775] to support proxy Mobile IPv6 (PMIPv6) [RFC5213], resulting in fast proxy Mobile IPv6 (FPMIPv6). This review does not consider the transport implications or effects of these previous protocols, but focuses only on any differences introduced by the fast proxy variant (FPMIPv6). FM [RFC5568] has a transition diagram involving three nodes: MN, PAR, and NAR. PM [RFC5213] has a transition diagram involving four nodes: MN, p-MAG, LMA, and n-MAG. The proposed FMP solution uses six nodes - MN, P-AN, N-AN, PMAG/PAR, NMAG/NAR, and LMA. It's difficult to understand how the additional cascading transactions between these nodes can occur without substantial impact to handover delay of some sort, but because the transitions are intended to occur in advance of an imminent handover these delays should not cause a substantial problem. Overall, I don't see a reason to doubt that this protocol impacts transport protocols less than PMIPv6. Issues of tunneling, e.g., impact to MTU, path MTU discovery, fragmentation or reassembly issues, would be the same as in PMIPv6. The same is true to impacts of path properties that affect transports, such as RTT, MTU size, or bandwidth. One other comment: Section 4 begins as if in the middle of a discussion. It would be useful to revise this to provide some context before just jumping in. Joe -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (MingW32) iEYEARECAAYFAkq8t3gACgkQE5f5cImnZruPuwCgw63TMC+u4ux4S2gfWak/Ig9K ZycAn1ukPEmGRq6PNlW/M7EWpKov0Szs =wHy1 -----END PGP SIGNATURE----- _______________________________________________ Ietf@xxxxxxxx https://www.ietf.org/mailman/listinfo/ietf