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Oracle Solaris Administration: IP Services     Oracle Solaris 10 1/13 Information Library
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Part I Introducing System Administration: IP Services

1.  Oracle Solaris TCP/IP Protocol Suite (Overview)

Part II TCP/IP Administration

2.  Planning Your TCP/IP Network (Tasks)

Network Planning (Task Map)

Determining the Network Hardware

Deciding on an IP Addressing Format for Your Network

IPv4 Addresses

IPv4 Addresses in CIDR Format

DHCP Addresses

IPv6 Addresses

Private Addresses and Documentation Prefixes

Obtaining Your Network's IP Number

Designing an IPv4 Addressing Scheme

Designing Your IPv4 Addressing Scheme

IPv4 Subnet Number

Designing Your CIDR IPv4 Addressing Scheme

Using Private IPv4 Addresses

How IP Addresses Apply to Network Interfaces

Naming Entities on Your Network

Administering Host Names

Selecting a Name Service and Directory Service

Network Databases

Using NIS or DNS as the Name Service

Using Local Files as the Name Service

Domain Names

Administrative Subdivisions

Planning for Routers on Your Network

Network Topology Overview

How Routers Transfer Packets

3.  Introducing IPv6 (Overview)

4.  Planning an IPv6 Network (Tasks)

5.  Configuring TCP/IP Network Services and IPv4 Addressing (Tasks)

6.  Administering Network Interfaces (Tasks)

7.  Configuring an IPv6 Network (Tasks)

8.  Administering a TCP/IP Network (Tasks)

9.  Troubleshooting Network Problems (Tasks)

10.  TCP/IP and IPv4 in Depth (Reference)

11.  IPv6 in Depth (Reference)


12.  About DHCP (Overview)

13.  Planning for DHCP Service (Tasks)

14.  Configuring the DHCP Service (Tasks)

15.  Administering DHCP (Tasks)

16.  Configuring and Administering the DHCP Client

17.  Troubleshooting DHCP (Reference)

18.  DHCP Commands and Files (Reference)

Part IV IP Security

19.  IP Security Architecture (Overview)

20.  Configuring IPsec (Tasks)

21.  IP Security Architecture (Reference)

22.  Internet Key Exchange (Overview)

23.  Configuring IKE (Tasks)

24.  Internet Key Exchange (Reference)

25.  IP Filter in Oracle Solaris (Overview)

26.  IP Filter (Tasks)


27.  Introducing IPMP (Overview)

28.  Administering IPMP (Tasks)

Part VI IP Quality of Service (IPQoS)

29.  Introducing IPQoS (Overview)

30.  Planning for an IPQoS-Enabled Network (Tasks)

31.  Creating the IPQoS Configuration File (Tasks)

32.  Starting and Maintaining IPQoS (Tasks)

33.  Using Flow Accounting and Statistics Gathering (Tasks)

34.  IPQoS in Detail (Reference)



Deciding on an IP Addressing Format for Your Network

The number of systems that you expect to support affects how you configure your network. Your organization might require a small network of several dozen standalone systems that are located on one floor of a single building. Alternatively, you might need to set up a network with more than 1,000 systems in several buildings. This setup can require you to further divide your network into subdivisions that are called subnets.

When you plan your network addressing scheme, consider the following factors:

The worldwide growth of the Internet since 1990 has resulted in a shortage of available IP addresses. To remedy this situation, the Internet Engineering Task Force (IETF) has developed a number of IP addressing alternatives.

If your organization has been assigned more than one IP address for your network or uses subnets, appoint a centralized authority within your organization to assign network IP addresses. That authority should maintain control of a pool of assigned network IP addresses, and assign network, subnet, and host addresses as required. To prevent problems, ensure that duplicate or random network numbers do not exist in your organization. Types of IP addresses in use today include the following:

IPv4 Addresses

These 32-bit addresses are the original IP addressing format that was designed for TCP/IP. Originally, IP networks have three classes, A, B, and C. The network number that is assigned to a network reflects this class designation plus 8 or more bits to represent a host. Class-based IPv4 addresses require you to configure a netmask for the network number. Furthermore, to make more addresses available for systems on the local network, these addresses were often divided into subnets.

Today, IP addresses are referred to as IPv4 addresses. Although you can no longer obtain class-based IPv4 network numbers from an ISP, many existing networks still have them. For more information about administering IPv4 addresses, refer to Designing Your IPv4 Addressing Scheme.

IPv4 Addresses in CIDR Format

The IETF has developed Classless Inter-Domain Routing (CIDR) addresses as a short to medium term fix for the shortage of IPv4 addresses. In addition, CIDR format was designed as a remedy to the lack of capacity of the global Internet routing tables. An IPv4 address with CIDR notation is 32 bits in length and has the same dotted decimal format. However, CIDR adds a prefix designation after the rightmost byte to define the network portion of the IPv4 address. For more information, refer to Designing Your CIDR IPv4 Addressing Scheme.

DHCP Addresses

The Dynamic Host Configuration Protocol (DHCP) protocol enables a system to receive configuration information from a DHCP server, including an IP address, as part of the booting process. DHCP servers maintain pools of IP address from which to assign addresses to DHCP clients. A site that uses DHCP can use a smaller pool of IP addresses than would be needed if all clients were assigned a permanent IP address. You can set up the DHCP service to manage your site's IP addresses, or a portion of the addresses. For more information, refer to Chapter 12, About DHCP (Overview).

IPv6 Addresses

The IETF has deployed 128–bit IPv6 addresses as the long term solution to the shortage of available IPv4 addresses. IPv6 addresses provide greater address space than is available with IPv4. Oracle Solaris supports IPv4 and IPv6 addressing on the same host, through the use of dual-stack TCP/IP. As with IPv4 addresses in CIDR format, IPv6 addresses have no notion of network classes or netmasks. As in CIDR, IPv6 addresses use prefixes to designate the portion of the address that defines the site's network. For an introduction to IPv6, refer to IPv6 Addressing Overview.

Private Addresses and Documentation Prefixes

The IANA has reserved a block of IPv4 addresses and an IPv6 site prefix for use on private networks. You can deploy these addresses on systems within an enterprise network but be aware that packets with private addresses cannot be routed across the Internet. For more information on private addresses, refer to Using Private IPv4 Addresses.

Note - Private IPv4 addresses are also reserved for documentation purposes. The examples in this book use private IPv4 addresses and the reserved IPv6 documentation prefix.