Get Addresses Of The Dns Servers Via Dhcp; Get Addresses Of The Ntp Servers Via Dhcp - Siemens SIMATIC ET 200AL System Manual

Addressing via DHCP

10.5 Get addresses of the DNS servers via DHCP

10.5 Get addresses of the DNS servers via DHCP
Requirements
• You have activated the address assignment via DHCP for at least one interface of the
S7-1500 CPU.
Get addresses from DNS servers via DHCP
To obtain the addresses of up to 4 DNS servers via DHCP, follow these steps:
1. Select the S7-1500 CPU in STEP 7.
2. In the properties of the CPU, navigate to "Advanced configuration" > "DNS configuration" >
"Server list".
3. For "Name resolution via DNS:" select "Set DNS server remotely (e.g. DHCP)" in the drop-
down list.
Result: If the DHCP server supplies addresses from DNS servers as option, the CPU uses up to
4 addresses.
10.6

Get addresses of the NTP servers via DHCP

Requirements
• You have activated the address assignment via DHCP for at least one interface of the
S7-1500 CPU.
Obtaining addresses from NTP servers via DHCP
To obtain the addresses of up to four NTP servers via DHCP, follow these steps:
1. Select the S7-1500 CPU in STEP 7.
2. In the properties of the CPU, navigate to "Time of day" > "Time synchronization"> "NTP
mode".
3. For "Time synchronization:" select "Set NTP server remotely (e.g. DHCP)" in the drop-down
list.
Result: If the DHCP server supplies addresses from NTP servers as option , the CPU uses up to
4 addresses.
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Function Manual, 05/2021, A5E03735815-AJ
Communication