Hello Luigi:
I was thinking; maybe we can use the I-Field defined in RFC 8505. It signals
what the opaque field is about, see fig 1 of RFC 8505.
So if we pick one value of the I-Field (say I=1) to mean PASA, we have the
whole opaque field to indicate whatever PASA needs to pass.
OTOH, if we do n
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Title : IPv6 Neighbor Discovery Multicast and Anycast Address
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