OSPFv3 Hello (`ospfv3_hello`)

Reached from

Lower layer	Selector	Value
`ospfv3`	`type`	1 (0x01)

Field	Type	Default	Description
`interface_id`	`uint(32)`	`1`	Interface ID of the sending interface.
`router_priority`	`uint(8)`	`1`	Router priority for the DR election (0 = never DR).
`options`	`flags(24)`	`0x13`	OSPFv3 options (V6, E, N, R, DC, AF bits).
`hello_interval`	`uint(16)`	`10`	Interval between Hello packets, in seconds.
`router_dead_interval`	`uint(16)`	`40`	Seconds without a Hello before the neighbor is declared down.
`designated_router`	`ipv4`	`0.0.0.0`	Designated Router (0.0.0.0 = none).
`backup_designated_router`	`ipv4`	`0.0.0.0`	Backup Designated Router (0.0.0.0 = none).
`neighbors`	`list<ipv4>` — rest of the PDU		Router IDs of the neighbors seen on the link.