Commands

Traceroute Command

The traceroute command is used to discover the routes that packets actually take when traveling to their destination. The device (for example, a router or a PC) sends out a sequence of User Datagram Protocol (UDP) datagrams to an invalid port address at the remote host.

Show ip ospf database command

To display lists of information related to the OSPF database for a specific router

Show ip ospf neighbor command

Use the show ip ospf neighbor command to observe the neighbor data structure.

-Neighbor ID the router ID of the neighbor router. The router ID is the highest IP address or the highest ip address among loopback addresses

-The Pri field indicates the priority of the neighbor router. The router with the highest priority becomes the designated router (DR).

-The State field indicates the functional state of the neighbor router

-The Dead Time field indicates the amount of time remaining that the router waits to receive an OSPF hello packet from the neighbor before declaring the neighbor down

-The Address field indicates the IP address of the interface to which this neighbor is directly connected.

-The Interface field indicates the interface on which the OSPF neighbor has formed adjacency.