Ian, > When receiving the Port Parameters option with an explicit PSID, the > client MUST use this explicit PSID in configuring its softwire interface. > If the client’s IPv4 address (configured via a separate sub-option) > is not 32 bit-long, the Port Parameters option MUST be discarded. > For MAP-E and MAP-T clients, the formula for the address length check > is "prefix4-len + ea-len = 32” and serves to ensure that the explicit > PSID is only applied to configurations with a completely formed IPv4 address.
I don't like the implications that IPv4 address can be != 32 bits. ;-) just simply: The Port Parameters option with an explicit PSID MUST be discarded if the softwire node isn't configured with a full IPv4 address (e.g. IPv4 prefix). ? cheers, Ole
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