> RFC 4291, Appendix A.
Thanks for the pointer. As far as I can tell from reading some IPv6
stuff, it really is broken to try to go from a link-local IPv6 address
back to a L2 ethernet address. For example, RFC 2464 (pointed to by RFC
4291) says:
Ethernet Address
The 48 bit Ethernet IEEE 802 address, in canonical bit
order. This is the address the interface currently
responds to, and may be different from the built-in
address used to derive the Interface Identifier.
It really seems to be setting ourselves up for trouble not to use
neighbor discovery to map IPv6 addresses to link-layer addresses.
- R.
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