You can configure the OSPFv3 hello interval to specify the interval between the hello packets sent on the interface. The hello interval value must be the same for all routers attached to a common link. Values are 1-65535 seconds.
This example configures VLAN 10 with a hello interval of 40 seconds.
SEFOS(config)# interface vlan 10 SEFOS(config-if)# ipv6 ospf hello-interval 40 SEFOS(config-if)# 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: 10.0.0.8 local address: fe80::214:4fff:fe6c:d04d Transmit Delay: 1 sec Priority: 1 IfOptions: 0x0 Timer intervals configured: Hello: 40, Dead: 40, Retransmit: 5, Poll: 120 Demand Circuit: Disable Neighbor Probing: Disable Nbr Probe Retrans Limit: 10 Nbr Probe Interval: 120 Hello due in 33 sec Neighbor Count is: 1 Adjacent with neighbor 10.0.0.8