System Administration Guide: Network Interfaces and Network Virtualization

Rules for Valid Link Names

When you assign link names, observe the following rules:

Note –

As an added restriction, you cannot use lo0 as a flexible link name. This name is reserved to identify the IP loopback interface.

The function of the link within your network setup can be a useful reference when you assign link names. For example, netmgt0 can be a link that is dedicated to network management. Upstream2 can be the link that connects to the ISP. As a general rule to avoid confusion, do not assign names of known devices to your links.