Ian,

> No. As long as you know what particular mechanism you B4 vendor has 
> implemented, you can provision accordingly.
> 
> The lwAFTR never has to do the LPM. It’s just got a tunnel endpoint address 
> configured by the operator.

I'm not comfortable with that.

is there any reason why you couldn't do it as MAP does?

- include a "Domain IPv6 prefix" in the set of provisioning parameters.
- the client does a longest match between the Domain IPv6 prefix and the 
End-user IPv6 prefixes
  and uses that to create the tunnel end point address.

that also allows the operator to use either the WAN side /64 or an address out 
of the PD as the tunnel endpoint address.

cheers,
Ole

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