* RA_DNS A space-separated list of recursive DNS servers from the RA
* AFTR The DS-Lite AFTR domain name
* AFTR_IP The DS-Lite AFTR resolved IPv6 address
* RA_DNS A space-separated list of recursive DNS servers from the RA
* AFTR The DS-Lite AFTR domain name
* AFTR_IP The DS-Lite AFTR resolved IPv6 address