Reference Guide

• Totally stubby areas are referred to as no summary areas in the Dell Networking operating system (FTOS).
Networks and Neighbors
As a link-state protocol, OSPF sends routing information to other OSPF routers concerning the state of the links between
them. The state (up or down) of those links is important.
Routers that share a link become neighbors on that segment. OSPF uses the Hello protocol as a neighbor discovery and
keep alive mechanism. After two routers are neighbors, they may proceed to exchange and synchronize their
databases, which creates an adjacency.
Router Types
Router types are attributes of the OSPF process.
A given physical router may be a part of one or more OSPF processes. For example, a router connected to more than
one area, receiving routing from a border gateway protocol (BGP) process connected to another AS acts as both an
area border router and an autonomous system router.
Each router has a unique ID, written in decimal format (A.B.C.D). You do not have to associate the router ID with a valid
IP address. However, to make troubleshooting easier, Dell Networking recommends that the router ID and the router’s
IP address reflect each other.
The following example shows different router designations.
567