Chapter 4. Using IP Unnumbered and VLSM
This chapter is broken into two sections. The first section discusses IP unnumbered. It provides scenarios showing how it works when properly configured and how it breaks when improperly configured.
The second section discusses variable length subnet masking (VLSM). It provides scenarios showing how it works when properly configured and how it breaks when improperly configured.
Before proceeding any further in this chapter, it is important to lay the groundwork for the discussion by defining the following terms:
IP unnumbered refers to using the network or subnet address of a local LAN interface as the router's network or subnetwork address for a point-to-point serial link. The term point-to-point means ...
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