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82 34980A User’s Guide
2 Features and Functions
DNS Server
The Domain Name Service (DNS) is an Internet service that translates
Domain names into IP addresses. Contact your network administrator to
determine if DNS is being used and for the correct address.
If you change the DNS address, you must cycle power on the 34980A to
activate the new setting.
• The default DNS Address for the 34980A is “0.0.0.0”.
• Dot-notation addresses (“nnn.nnn.nnn.nnn” where “nnn” is a byte
value) must be expressed with care, as most web software on the
computer will interpret byte values with leading zeros as octal numbers.
For example, “255.255.020.011” is actually equivalent to decimal
“255.255.16.9” not “255.255.20.11” because “.020” is interpreted as “16”
expressed in octal, and “.011” as “9”. To avoid confusion, use only
decimal expressions of byte values (0 to 255), with no leading zeros.
For example, the 34980A assumes that all dot-notation addresses are
expressed as decimal byte values and strips all leading zeros from these
byte values. Thus, attempting to set an IP address of “255.255.020.011”
will become “255.255.20.11” (a purely decimal expression). Be sure to
enter the exact expression, “255.255.20.11”, in your computer web
software to address the instrument. Do not use “255.255.020.011” — the
computer will interpret this address differently due to the leading zeros.
• The DNS address is stored in non-volatile memory, and does not change
when power has been off, after a Factory Reset (
*RST command), or
after an Instrument Preset (SYSTem:PRESet command).
Front Panel Operation:
Utility > REMOTE I/O > LAN > LAN SETTINGS > MODIFY > DHCP OFF >
AUTO IP OFF > . . . DNS SERVER
Remote Interface Operation:
SYSTem:COMMunicate:LAN:DNS <address>