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each identified by a single profile [referred to as a network configuration profile (NCP)]. For example, you could create a profile named office for a notebook PC that configures the system with static IP addresses and DNS server locations. An alternate home profile might

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Profile-Based Network Configuration

• Provides a predetermined set of system-defined profiles

• Provides capabilities for creating various types of user-defined profiles

• Provides the following profile types:

– Network Configuration Profiles (NCPs) – Network Configuration Units (NCUs) – Location profiles

– External Network Modifiers (ENMs) – Known WLANs

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The following profile types are used for profile-based network configuration:

• Network Configuration Profiles (NCPs): An NCP is the principal profile type that is used to specify the configuration of network datalinks and IP interfaces. NCPs are configured with property values that specify how the network is configured when that particular NCP is activated on the system. NCPs can be reactive or fixed. You can have multiple reactive NCPs configured, but Oracle Solaris 11 currently only supports one fixed NCP named DefaultFixed.

The Automatic NCP represents all the links and interfaces that are currently in the system. The content of the Automatic NCP changes if network devices are added or removed. The Automatic NCP provides access to a profile that utilizes DHCP and address auto configuration, which makes it possible to obtain IP addresses for the system. This NCP also implements a link selection policy that favors wired links over wireless links. If the specification of an alternate IP configuration policy or an alternate link selection policy is required, you would need to create another NCP on your system.

You cannot delete the Automatic NCP. You can copy this NCP and make changes to the copy.

• Network Configuration Units (NCUs): The individual configuration information (or properties) that defines an NCP is configured within NCUs. An NCU can represent a physical link or an interface, and contains properties that specify the configuration for that link or interface. There are two types of NCUs:

- Link NCUs: Link NCUs, for example, physical devices, are Layer 2 entities in the Open Systems Interconnection (OSI) model. Link NCUs represent data links. There are several different classes of data links:

 Physical links (Ethernet or WiFi)

 Tunnels

 Aggregations

 Virtual local area networks (VLANs)

 Virtual network interface cards (VNICs)

- Interface NCUs: Interface NCUs, specifically, IP interfaces, are Layer 3 entities in the OSI model. They represent the following IP layer classes:

 IP interfaces

 IPMP interfaces

 VNI interfaces

• Location Profiles: They specify the system-wide network configuration, for example, naming services, domain, IPFilter configuration, and IPsec configuration. By default, three location profiles are predefined by the system:

- DefaultFixed: The DefaultFixed Location is enabled whenever the DefaultFixed NCP is active. The DefaultFixed Location cannot be directly modified by the using the netcfgcommand.

- Automatic: The Automatic Location is activated if there are networks available but no other location profile supersedes it. You can modify the Automatic Location by using the netcfgcommand.

- NoNet: The NoNet Location has very specific activation conditions. This Location is applied by the system to a stand-alone system when no local interfaces have an assigned IP address. You can modify the NoNet Location by using the netcfg command.

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• External Network Modifiers (ENMs): An ENM is a profile that manages applications that are responsible for creating a network configuration that is external to the system’s network configuration, for example, a VPN application.

• Known Wireless Local Area Networks (WLANs): A Known WLAN is a profile type that stores information about the wireless networks that are discovered by your system.

For more information about profiles types and their descriptions, refer to http://docs.oracle.com/cd/E36784_01/html/E37475/gneee.html#scrolltoc.

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The system’s network configuration is organized into various types of profiles. These profiles are either reactive or fixed. Reactive network configuration mode means that the system automatically adapts to any changes in network conditions and network configuration without requiring any manual reconfiguration. For example, if your wired network interface becomes unplugged or if a new wireless network becomes available, the system adapts accordingly.

With the primary focus on mobility, the reactive network configuration policy in Oracle Solaris enables the system’s configuration to change dynamically in response to different network events or at your request. This type of network configuration works best for notebook PCs and in situations where network conditions change often. When using reactive network

configuration, basic Ethernet and WiFi configuration of a system is automatically performed.

The system automatically connects to a wired or wireless network at startup and notifications about the status of the currently active network connection are displayed on the desktop.

Reactive profiles are configured with properties that determine the conditions under which the profile is enabled. These properties enable the profile to be applied dynamically to the system by the network management daemon, nwamd, as needed.

You use two commands to administer network configuration when you use reactive mode:

• The netcfg command for making network configuration changes to profiles

• The netadm command for displaying information about all the profiles on a system, and for enabling and disabling profiles.

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