Fixed mode means the instantiated configuration on the system is persistent, regardless of whether any changes in network conditions occur. When such changes occur, such as the addition of interfaces, you have to reconfigure the network for the system to adapt to the new environment. When using a fixed mode, your system is configured by using the same set of network configuration commands every time. Corporate servers most often use this configuration mode due to a relatively stable network environment. When using the fixed mode, you use the dladm and ipadm commands to manage the various aspects of network configuration. See Oracle Solaris Network Administration Commands.