OSPF Hello Packet Information

TABLE 5 . 1
OSPF Hello Packet Information
Originating Router Characteristic Description
Router ID The configured router ID. If one is not configured, the highest
active IP address on the router. (Loopback addresses
are used first. If no loopback interfaces are configured,
OSPF will choose from physical and logical interfaces.)
Area ID The area to which the originating router interface belongs.
Authentication information The authentication type and corresponding information.
Network mask The IP mask of the originating router’s interface IP address.
Hello interval The period between Hello packets.
Options OSPF options for neighbor formation.
Router priority An eight-bit value used to aid in the election of the DR
and BDR. (Not set on point-to-point links.)
Router dead interval The length of time allotted for which a Hello packet must
be received before considering the neighbor down—four
times the Hello interval, unless otherwise configured.
DR The router ID of the current DR.
BDR The router ID of the current BDR.
Neighbor router IDs A list of the router IDs for all the originating router’s
neighbors.