Ricoh fi-8040 Operator's Manual page 219

When setting the IP address automatically, check whether the DHCP server functions
normally.
Even when the DHCP server functions normally, an IP address may not be assigned
correctly depending on the settings for the DHCP server. Check the operation status
and the settings for the DHCP server.
HINT
The IP address of the scanner can also be checked in fi Series Network Settings.
For details, refer to
●
Is the IP address of the scanner used for other communication devices?
Solution
If there are multiple communication devices using the same IP address on the same network,
communication may fail. Avoid duplicates in IP addresses.
HINT
If there is an IP address conflict, a notification appears on the touch screen.
●
Can the scanner and NTP server communicate with one another?
Solution
Start up the command prompt on a computer in the same subnetwork as the scanner, then
specify the IP address of the NTP server using the tracert command to check communication
between the scanner and NTP server.
If there is a communication issue, check the following:
● Are the cables properly connected to the network device (switch, hub, router, etc.)?
● When MAC address filtering is set for the network device (switch, hub, router, etc.), set the
filter to approve the MAC address of the scanner.
The MAC address of the scanner can be checked by following the below procedure:
→ [Scanner Information] → [MAC Address] under [Network]
● When the protocol filter function is set for the network device (switch, hub, router, etc.),
enable the UDP protocol to be used for communication.
● When communication between connected devices is prohibited by the network device
(switch, hub, router, etc.) (for example, due to the network isolation function), enable the
communication.
For the settings on the network device, refer to the manual of your network device.
Network Settings (fi Series Network Settings) (page
219
Troubleshooting
359).