Hello,
A couple things I noticed. In your show EIGRP command you have ipv6 eigrp 1 configured twice. Which 2 interfaces is it on? I can see it on the tunnel, but if its on the underlay (physical interface of F0/0 as well then that overrides the OSPF network as its go a lower AD and will cause recursive routing.
Secondly you don't have any NHRP commands to actually make DMVPN function.
Thirdly which DMVPN phase are you trying to achieve? As they each have slightly different configurations.
Can you provide some more information on what you are trying to accomplish and we can better help you. If I were to assume, it would look something like this:
On the HUB (R6) tunnel interface add:
ipv6 nhrp network-id 1
ipv6 nhrp map multicast dynamic
tunnel mode gre multipoint ipv6
no ipv6 split-horizon eigrp 1
no ipv6 next-hop-self eigrp 1
On the Spoke (R7) tunnel interface add:
ipv6 nhrp network-id 1
tunnel mode gre multipoint ipv6
ipv6 nhrp nhs 2001:DB8:1111:1::7 nbma 2001:DB8:0:3::1 multicast
Remove: tunnel destination2001:DB8:0:3::1
You will also need to enable the IPV6 EIGRP router process with the following commands:
conf t
ipv6 router eigep <AS#>
no shutdown
You might also need to configure link local address on the tunnel interfaces themselves for EIGRP neighborship. I tried using the default generated on and it gave me some weird errors in CML.
I may have to test this later in my lab but this "should" work. If not can you provide output form the following commands:
sh ipv6 eigrp inerfaces
sh run int f0/0 - on both devices
sh run int tunnel 0 - on both devices
-David
