RadiSys SEG-100 Administration Manual
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Contents
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3Addressing63Address booksThe SEG address book contains named objects representing various types of IP addresses,including single IPv4 and IPv6 addresses and networks, as well as ranges of addresses.Ethernet MAC addresses can also be defined in the address book.Note: In this guide, an IPv6 Prefix will often be referred to as a Network in this guide. This isdone to be consistent with the usage of the word Network with IPv4.Address book benefitsUsing address book objects has a number of important benefits:• They increase understanding of the configuration by referencing meaningful symbolicnames.• They enable you to enter address object names instead of numerical addresses, reducingerrors.• They enable you to define an address object just once in the address book and thenreference this definition, so that changing the definition automatically changes allreferences to it.Address typesThe address book can contain objects for two types of addresses: IP addresses and MACaddresses. These are described next.IP addressesIP address objects are used to define symbolic names for various types of IP addresses.Depending on how the address is specified, an IP address object can represent a single IPaddress (a specific host), a network, a range of IP addresses, and even a DNS name.The following list describes the various types of addresses an IP address object can hold, alongwith what format that is used to represent that specific type:• Host: A single host is represented simply by its IP address. This can be either an IPv4 orIPv6 address. For example, 192.168.0.14.It also possible to specify a comma‐separated list of addresses. These can be a mixture ofIPv4 and IPv6 addresses. For example, 192.168.0.14,10.15.0.50,2001:DB8::1.• IP network: An IPv4 network is represented using the Classless Inter Domain Routing(CIDR) form. CIDR uses a forward slash and a number (0‐32) to denote the size of thenetwork as a postfix. This number corresponds to the number of binary ones in thenetmask.The suffix /24 corresponds to a class C net with 256 addresses (netmask 255.255.255.0).The suffix /27 corresponds to a 32 address net (netmask 255.255.255.224) and so on.For IPv6, the IP network corresponds to the IPv6 prefix. |
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