I needed to test IPv6 overlay on DMVPN. Easy enough; there are plenty of DMVPN configuration guides out there and even some on IPv6. I tested on a version of 12.4T on 7200-series routers in GNS3 and the config was really as simple as taking my working IPv4 DMVPN setup and adding the same commands with an "ipv6" prefix, using IPv6 addresses and adding IPv6 EIGRP.
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