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Version -03 Changes
Aligns SPD representation format with RFC 4301
Describes IKEv2 Peer Authorization Database (PAD) entries
At least IPv4 addresses and shared keys should be supported
Adds references to other documents describing using transport mode in a similar context (RFC3884, RFC3193, RFC4023)
Moves tunnel mode discussion to appendix
Recommends transport mode
Keeps discussion of the tunnel mode issues
Notes that tunnel mode (when implemented without an interface) may be applicable in scenarios where the lack of multicast and link-local traffic is not an issue and, e.g., MOBIKE is needed
Moves tunnel mode implementation approach discussion to appendix
Interface or not, SSPD/GSPD
Also moves Dynamic Address Configuration, NAT traversal and Mobility, and Tunnel Endpoint Discovery to appendix
The first two are most applicable to tunnel mode which is in appendix
The last requires manual configuration so TEP discovery does not work well right now
PPT Version