CHAPTER 18
OSPF Messages
Beginning of the teaching for life,
The instructions for well-being . . .
Knowing how to answer one who speaks,
To reply to one who sends a message.
—Amenemope, Egyptian pharaoh, c.1100 b.c.e
Various kinds of OSPF messages are exchanged between routers in the process of synchronizing their Link State databases. This Database Exchange Process is reviewed in this chapter, including a description of the types of messages sent in a simple network and the modifications that are made for application to a larger Ethernet system, especially for multicasting/broadcasting.
The Types of Messages Sent
Once two neighboring routers ...
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