In my previous mail I wrote:
Rule 8: Use longest matching prefix.
If CommonPrefixLen(SA, D) > CommonPrefixLen(SB, D), then prefer SA.
Similarly, if CommonPrefixLen(SB, D) > CommonPrefixLen(SA, D), then
prefer SB.
=> this rule has no meaning when CommonPrefixLen is not bound to 0..64.
=> I've changed a bit my mind about this: in fact the 64 boundary works
only for IPv6 addresses, not for IPv4 addresses where the right
boundary is between 96 and 128 (exclusive). So the right implementation
of the CommonPrefixLen() function must include a sound maximal value for
each prefix of the policy table.
(BTW are there common cases where D8 is not overruled by D6 for
not twisted policy tables?)
=> multicasts... I still wonder if the D8 is useful.
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