Devices need compatible addressing information to communicate on a network. DHCP commonly supplies an address, subnet mask, gateway, and DNS settings. A conflicting address or an unavailable DHCP service can interrupt connectivity even when a cable or Wi-Fi connection appears active.
Inspect the current configuration
In Windows Command Prompt, run:
ipconfig /allIdentify the adapter actually being used; disconnected adapters and VPN adapters can make the output confusing. Record the IPv4 address, gateway, DNS servers, DHCP status, and any error message. Share this information privately with your support team.
An IPv4 address beginning with 169.254 can indicate that a device did not obtain a DHCP lease when one was expected. Some direct-link applications intentionally use these addresses, so the number alone does not establish a fault.
Look for recent changes
- Was a new router, switch, printer, or access point installed?
- Was the device moved to another port, Wi-Fi network, or VLAN?
- Did someone enter a static address manually?
- Are several devices affected, or only one?
Avoid creating another conflict
Do not choose a spare-looking address or disable DHCP on network equipment yourself. Your administrator should check the scope, reservations, VLAN path, and possible unauthorized DHCP servers. Releasing or renewing an address can interrupt remote access; arrange that step with support when needed.
Get help with your network
For an existing service issue, open an AvrinTech support ticket. For an assessment or planned improvement, request a scoped proposal and review our networking services. Work, coverage, and response targets depend on your agreement.
