OSPFv3 passive
OSPFv3 sends LSAs to all other routers on the same VLAN interface. With OSPFv3 configured as passive on a VLAN interface, the routing switch is identified as a route in the OSPFv3 domain, but does not form an adjacency to any other router and does not send or receive OSPFv3 traffic on the subject VLAN interface. (A VLAN configured as passive operates similar to a VLAN connected to a stub network and does advertise the interface as a stub link into OSPFv3.)
Up to 128 active interfaces and a combined total of 512 active and passive interfaces are supported on the routing switch.