Chapter 5: IP Address Management

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5.1. The Address Book

The Address Book contains named objects representing various types of IP addresses, including single IPv4 and IPv6 addresses, networks as well as ranges of addresses. Ethernet MAC addresses can also be defined in the address book.

	Note: Network and prefix are synonymous
	An IPv6 Prefix will often be referred to as the IPv6 Network in this guide. This is done to be consistent with the usage of the word Network with IPv4.

Address Book Benefits

Using address book objects has a number of important benefits:

It increases understanding of the configuration by referencing meaningful symbolic names.
Using address object names instead of entering numerical addresses reduces errors.
By defining an address object just once in the address book and then referencing this definition, changing the definition automatically also changes all references to it.