Dhcp With Dns - Siemens SIMATIC ET 200AL System Manual

10.2

DHCP with DNS

As of STEP 7 V17, the S7-1500 CPU supports the host name and domain address parameters
used in name-based communication (DNS).
For specific communication services, name-based addressing via the complete name
consisting of host name and domain, is useful:
• The CPU is addressable under the complete name, for example at OPC UA, Open User
Communication. In the case of dynamic IP address assignment by the DHCP server, unique
addressing is always possible through the DNS name.
• Certificates of the S7-1500 CPU may contain the complete name, for example, for
OPC UA communication, web server, secure communication.
– Only if you configure host name and domain for the S7-1500 CPU in STEP 7, then the
– As soon as you obtain the host name and/or domain via DHCP or assign it via the user
Communication
Function Manual, 05/2021, A5E03735815-AJ
complete name is entered in the device certificates in the project as subject alternate
name (SAN).
program, the complete name is not stored in the device certificates in the project.
Addressing via DHCP
10.2 DHCP with DNS
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