5.3. Auto-generated Address Objects

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To simplify the configuration, a number of address objects in the address book are automatically created by cOS Stream when the system starts for the first time and these objects are used in various parts of the initial configuration.

Generated Objects

The following address objects are auto-generated by cOS Stream:

Interface Addresses

For each Ethernet interface in the system, two IPv4 Address objects are predefined; one object for the IP address of the actual interface, and one object representing the local network for that interface.

Interface IPv4 address objects are named <interface-name>_ip and network objects are named <interface-name>_net. As an example, an interface named if1 will have an associated interface IP object named if1_ip, and a network object named if1_net.

all-nets-ip4

The all-nets-ip4 IPv4 address object is initialized to the IPv4 address 0.0.0.0/0, which represents all possible IP4 addresses. The all-nets-ip4 IP object is used extensively in the configuration and it is important to understand its significance.

all-nets-ip6

The all-nets-ip6 object performs the same function as all-net-ip4 but for the IP6 address space.

all-nets

The all-nets object includes all IP4 and IP6 addresses.

The netobjects command shows the current address book contents. For example:

System:/> netobjects
				
all-nets      0.0.0.0/0, ::/0  
all-nets-ip4  0.0.0.0/0        
all-nets-ip6  ::/0

Assigning Multiple IP Addresses to an Interface

As discussed in Section 3.1, Ethernet Interfaces, it is possible to assign multiple addresses to a single Ethernet interface. This is done by assigning the addresses to the interface's address object. For example:

System:/> set Address IPAddress if1_ip Address=10.1.1.2,198.10.2.1

There is no limit to the number of addresses that can be assigned to a single Ethernet interface.