Printer grabs a different IP and nothing works anymore
A printer with dynamic IP (DHCP without reservation) is a time bomb. After DHCP restart or a long power-off it grabs another IP and every driver bound to hostname breaks. DHCP reservation on MAC address fixes it.
support/printers-scanners/printer-mac-dhcp-reserveringsteps: 5
Try this first
- Read the printer's MAC from the self-test page (usually 'Hardware Address' or 'MAC').
- On your router/firewall/DHCP server: create a reservation saying 'MAC X always gets IP Y'. UniFi, FortiGate, Synology, OPNsense, MikroTik all support it.
- Reboot the printer or release/renew via web admin.
- Configure the Windows driver or CUPS to use a hostname (e.g. printer-finance.intern), not the IP. Then IP changes don't break it.
- Document it: make a printer-MAC-IP-hostname list. On staff turnover or when you leave IT, this is the first list a successor needs.
When to bring us in
For a 5+ printer fleet it pays to do this systematically with documentation. We include it in a broader network inventory.
See also
- Printer suddenly not foundFor everyone at once: print server or network. For one person: local Windows driver or expired authorisation.
- Print job stuck in queue, nothing happensA stuck queue blocks all subsequent prints. Cleaning takes two minutes.
- Scanner no longer sends emails (scan-to-email)Almost always: the account the scanner uses had its password expire, or the mail provider blocks old protocols.
None of the above fits?
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