interface Tunnel1
 ipv6 address FE80::2 link-local
 ipv6 nhrp map multicast 10.1.1.1
 ipv6 nhrp map FE80::1/64 10.1.1.1
 ipv6 nhrp network-id 1
 ipv6 nhrp nhs FE80::1
 tunnel source FastEthernet0/0
 tunnel mode gre multipoint
 tunnel key 0