Epson WorkForce Enterprise WF-C21000 Series - Page 264

Check the network connection of the computer. See the documentation provided with the computer for
details.
The printer has been connected by Ethernet using devices that support IEEE802.3az (Energy
Ecient Ethernet).
Solutions
When you connect the printer by Ethernet using devices that support IEEE802.3az (Energy
Ecient
Ethernet), the following problems may occur depending on the hub or router that you are using.
❏ Connection becomes unstable, the printer is connected and disconnected again and again.
❏ Cannot connect to the printer.
❏ e communication speed becomes slow.
Follow the steps below to disable IEEE802.3az for the printer and then connect.
1.
Remove the Ethernet cable connected to the computer and the printer.
2.
When IEEE802.3az for the computer is enabled, disable it.
See the documentation provided with the computer for details.
3.
Connect the computer and the printer with an Ethernet cable directly.
4.
On the printer, print a network connection report.
“Printing a Network Connection Report” on page 321
5.
Check the printer's IP address on the network connection report.
6.
On the computer, access Web Cong.
Launch a Web browser, and then enter the printer's IP address.
“Running Web Cong on a Web Browser” on page 406
7.
Select the Network Settings tab > Wired LAN.
8.
Select OFF for IEEE 802.3az.
9.
Click Next.
10.
Click OK.
11.
Remove the Ethernet cable connected to the computer and the printer.
12.
If you disabled IEEE802.3az for the computer in step 2, enable it.
13.
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.
The Printer Cannot Connect by USB (Mac OS)
e
following causes can be considered.
Solving Problems > The Printer Does Not Work as Expected > Cannot Send or Receive Faxes
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