Knowledge Base / Understanding Fallback IP Addresses (169.254.x.x)

Understanding Fallback IP Addresses (169.254.x.x)

Explains why devices may assign a 169.254.x.x address when DHCP is unavailable.

Applies to: Network-capable devices
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NTDS/TCDS displays, including LUX: NTP and network instructions apply to NTP or dual controllers. TC controllers have no NTP or network options.

What a 169.254.x.x address means

A 169.254.x.x address is a fallback (link-local) address. It commonly appears when a device is configured for DHCP but no DHCP server is available on the network.

Why it happens

Fallback addressing allows limited local communication on the same physical network segment. It does not indicate a hardware failure.

Common scenarios

What to do next

If you require a stable address, configure the device with a static IP (or ensure DHCP is available) using WinDiscovery.

Related articles

Article ID: KB-NET-010
KB Version: