When you connect the printer via Ethernet using devices that support IEEE802.3az (Energy Efficient Ethernet), the following problems may occur depending on the hub or router that you are using.
This setting is only available on models with wired LAN functionality.
The printer connection is unstable, and continuously connects and disconnects.
You cannot connect to the printer.
The communication speed is slow.
Follow the steps below to disable IEEE802.3az for the printer and then reconnect.
Remove the Ethernet cable connected to the computer and the printer.
If IEEE802.3az is enabled on the computer, disable it.
See the documentation provided with the computer for details.
Connect the computer and the printer directly with an Ethernet cable.
On the printer, print a Network Connection Report.
Checking the Printer's Network Connection Status (Network Connection Report)
Check the printer's IP address on the Network Connection Report.
On the computer, access Web Config.
Launch a Web browser, and then enter the printer's IP address.
Select the Network tab > Wired LAN.
Select OFF for IEEE 802.3az.
Click Next.
Click OK.
Remove the Ethernet cable connected to the computer and the printer.
If you disabled IEEE802.3az for the computer in step 2, enable it.
Connect the Ethernet cables that you removed in step 1 to the computer and the printer.
If the problem still occurs, devices other than the printer may be causing the problem.