Canon EOS-1D X Instruction Manual page 89

What to check on the network as a whole
Does your network include a router or similar device that serves
as a gateway?
If applicable, ask your network administrator for the network gateway
address and enter it on the camera.
Make sure the gateway address setting is correctly entered on all
network devices, including the camera.
25: Another terminal has set the same IP address
Is another device on the camera network using the same IP
address as the camera?
This error occurs if the camera is connected to a network where
another device subsequently connects with the same IP address.
Change the camera's IP address to avoid using the same address as
another device on the network. Otherwise, change the IP address of
the device that has a redundant address.
26: No response from DHCP server
What to check on the camera
On the camera, the network setting is [Auto setting]. Does the
error occur under this setting?
If you are not using a DHCP server, set the camera's network setting
to [Manual setting] (p.17).
Handling Error Messages
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