The following config is derived from a working config on a OpenWRT Linux router. The original setup has two separate networks: one with a public IPv6 range; the other network based on a unique local address. The VPN network is subnet 0, the public network 1, and the private network 2. For OSPF to work correctly, protocol 89 must be accessible (usually is).
See more: http://www.thuannguyen.net/sample-ipv6-quagga-config.html
ospf6d.conf 
Edit
password whatever ! !adapter setup ! interface br0 ipv6 ospf6 cost 1 ipv6 ospf6 hello-interval 10 ipv6 ospf6 dead-interval 40 ipv6 ospf6 retransmit-interval 5 ipv6 ospf6 priority 1 ipv6 ospf6 transmit-delay 1 ipv6 ospf6 instance-id 1 ! interface bond0 ipv6 ospf6 cost 1 ipv6 ospf6 hello-interval 10 ipv6 ospf6 dead-interval 40 ipv6 ospf6 retransmit-interval 5 ipv6 ospf6 priority 2 ipv6 ospf6 transmit-delay ipv6 ospf6 instance-id 2 ! !router setup ! router ospf6 router-id 0.0.0.1 redistribute static redistribute connected area 0.0.0.1 range 2001:db8:beef:1::/64 area 0.0.0.1 range 2001:db8:beef:2::/64 interface br0 area 0.0.0.1 interface bond0 area 0.0.0.0
zebra.conf Edit
hostname www.thuannguyen.net password whatever ! interface br0 link-detect no ipv6 nd suppress-ra ipv6 nd ra-interval 10 ipv6 address 2001:db8:beef:1::ffff/64 ipv6 address 2001:db8:beef:2::ffff/64 ipv6 nd prefix 2001:db8:beef:1::/64 ipv6 nd prefix 2001:db8:beef:2::/64 ! interface bond0 link-detect ipv6 address 2001:db8:beef:0::1/64 ipv6 address 2001:db8:beef:0::2/64 ! interface lo link-detect ! ipv6 forwarding ipv6 route 2001:db8:beef:1::/64 br0 ipv6 route 2001:db8:beef:2::/64 br0
