1. FXR90 RFID Reader Integration Guide
  2. Administrator Console
  3. Using Zero-Configuration Networking when DHCP Server is Not Available
  • FXR90 Integration Guide
Using Zero-Configuration Networking when DHCP Server is Not Available

Using Zero-Configuration Networking when DHCP Server is Not Available

If DHCP server is not available, the FXR90 readers can use zero-configuration networking to automatically provide a unique network IP address. The reader can then use TCP/IP to communicate with other computers also using a zero-configuration networking-generated IP address.
When using zero-configuration networking, the reader cannot communicate with computers on different subnets, or that do not use automatic private IP addressing. Automatic private IP addressing is enabled by default.
When zero-configuration networking executes after failing to detect a DHCP server, the reader automatically assigns an IPv4 IP address to the Ethernet interface in the form
169.254.xxx.xxx
. This IP address is predictable because it uses the last 2 bytes of the MAC address, usually represented as HEX values, to complete the IPv4 address. These values are converted to decimal format. For example, if the MAC address ends with
55:9A
, the IPv4 address assigned by the zero-configuration algorithm is
169.254.85.148
.
Windows-based computers support APIPA/zero-configuration networking by default when DHCP fails. To enable APIPA for a Windows PC, go to support.microsoft.com/ and search for APIPA.