Keysight N777xC Series Tunable Laser Family Programming Guide 45
Instrument Setup and Status 3
 
System Communicate - The :SYST:COMMunicate sub tree 
We recommend you change network settings using the local user 
interface. 
Some notes on DHCP/AutoIP/DNS 
• If DHCP is enabled but no DHCP server is found, the instrument tries to 
use AutoIP as a fallback. This may take about 2 minutes. 
• Depending on the available network capabilities, the instrument tries to 
tell the DNS server its host name or read the host and domain named it 
has been assigned. 
MAC address:
The Media Access Control (MAC) number is a unique number associated 
with each network adapter. 
The instrument does not close open connections when restarting the network 
interface (:SYSTem:COMMunicate:ETHernet:RESTart). This means the number of 
possible connections is reduced by the number of previously open connections. 
However, the instrument does make sure connections are still alive. It should 
release unused open connections after about two minutes.
Command: :SYSTem:COMMunicate:ETHernet:AUTOip:ENABle?
Syntax: :SYSTem:COMMunicate:ETHernet:AUTOip:ENABle?
Description: Check whether Automatic IP addressing is enabled or disabled.
Parameters: None
Response: Boolean (0 | 1)
Example: :SYST:COMM:ETH:AUTO:ENAB?