Rockwell Automation Ethernet Design Considerations Reference Manual - Manual (Page 37)

Rockwell Automation Publication ENET-RM002C-EN-P - May 2013 37
Ethernet Infrastructure Features Chapter 3
The DNS server refers to its table and sends back an IP address for the requested
name. Once the client device receives the IP address for a name, it stores it in its
own table so it does not have to ask for the IP address every time. The device still
sends an ARP request if it needs to decode the IP address into a hardware address.
DNS Server
I have IP address
130.151.3.4
1756 Controller
1734 POINT I/O
PowerFlex Drive
130.151.3.4
DNS Table
Name IP Address
Controller 130.151.3.5
PowerFlex Drive 130.151.3.5
POINT I/O 130.151.3.5