HEIDENHAIN iTNC 530 HSCI Technical Manual page 1866

Tab Option
Interfaces List of the active Ethernet interfaces with information as to whether the interface is
active, the name, the connector and the IP configuration
Activate button:

Activate the selected interface (the letter X appears in the Active column)
Deactivate button:

Deactivate the selected interface (a dash (–) appears in the Active column)
Configuration button:

Open the Configuration menu
IP forwarding
1866
Select the Interfaces tab in the configuration menu of the interface:

Meaning
This function must be inactive by default.
Only activate this function if external access to the second,
optional Ethernet interface of the control (available on the
MC 62xx) via the TNC is necessary for diagnostic purposes.
HEIDENHAIN Technical Manual iTNC 530 HSCI