User's Manual
22
Chapter 6: Network Tab  airFiber X User Guide
Ubiquiti Networks, Inc.
 - IP Address  Specify the IP address of the airFiberX 
radio. This IP will be used for device management 
purposes.
 - Netmask  When the netmask is expanded into its 
binary form, it provides a mapping to define which 
portions of the IP address range are used for the 
network devices and which portions are used for host 
devices. The netmask defines the address space of the 
airFiberX radio’s network segment. The 255.255.255.0 
(or “/24”) netmask is commonly used on many Class C 
IP networks.
 - Gateway IP  Typically, this is the IP address of the host 
router, which provides the point of connection to the 
Internet. This can be a DSL modem, cable modem, or 
WISP gateway router. The airFiberX radio directs data 
packets to the gateway if the destination host is not 
within the local network.
 - Primary DNS IP  Specify the IP address of the primary 
DNS (Domain Name System) server.
 - Secondary DNS IP  Specify the IP address of the 
secondary DNS server. This entry is optional and used 
only if the primary DNS server is not responding.
Management VLAN  If enabled, automatically creates a 
management Virtual Local Area Network (VLAN). 
•  VLAN ID  Enter a unique VLAN ID from 2 to 4094. 
Auto IP Aliasing  If enabled, automatically generates an 
IP address for the corresponding WLAN/LAN interface. 
The generated IP address is a unique Class B IP address 
from the 169.254.X.Y range (netmask 255.255.0.0), which 
is intended for use within the same network segment 
only. The Auto IP always starts with 169.254.X.Y, with X 
and Y as the last two octets from the MAC address of 
the airFiberX radio. For example, if the MAC address is 
00:15:6D:A3:04:FB, then the generated unique Auto IP will 
be 169.254.4.251. (The hexadecimal value, FB, converts to 
the decimal value,251.)
The Auto IP Aliasing setting can be useful because you 
can still access and manage devices even if you lose, 
misconfigure, or forget their IP addresses. Because an 
Auto IP address is based on the last two octets of the MAC 
address, you can determine the IP address of a device if 
you know its MAC address.
airView Port  The port number associated with the 
airView spectrum analyzer tool. The default value is 18888. 
For detailed information on the airView tool, refer to 
“airView” on page 36.










