If you want to configure all interfaces to be passive, you must do so before you create the interfaces.
SEFOS(config)# ipv6 router ospf
SEFOS(config-router)# passive-interface SEFOS(config-router)# end
SEFOS# show ipv6 ospf interface vlan 10
Ospfv3 Interface Information
Interface Name: vlan10 Interface Id: 41 Area Id: 0.0.0.6
Local Address: fe80::214:4fff:fe6c:628f Router Id: 10.0.0.1
Network Type: BROADCAST Cost: 1 State: DR
Designated Router Id: 10.0.0.1 local address: fe80::214:4fff:fe6c:628f
Backup Designated Router Id: 0.0.0.0 local address: (null)
Transmit Delay: 1 sec Priority: 1 IfOptions: 0x0
Timer intervals configured:
Hello: 10, Dead: 40, Retransmit: 5, Poll: 120
Demand Circuit: Disable Neighbor Probing: Disable
Nbr Probe Retrans Limit: 10 Nbr Probe Interval: 120
No Hellos (Passive interface)
Neighbor Count is: 0