Configuring Static Ip Address Assignment - Siemens SIMATIC NET SCALANCE M-800 Getting Started

2.3

Configuring static IP address assignment

For nodes in permanent operation, static IP address assignment should be preferred, for
example for a local NTP server. The IP address of the NTP server is used in the DHCP
option.
As long as the NTP server can be reached at the same IP address, the DHCP option will
work correctly. If the IP address changes, the DHCP option contains incorrect information.
For the example, the IP address is assigned to the MAC address of the NTP server. This
means that the NTP server always has the same IP address.
In this configuration example, the NTP server can be reached with the following IP address
setting:
IP address
192.168.100.87
Requirement
● The NTP server obtains the IP address from a DHCP server and identification is based
on the MAC address.
Procedure
1. Click on "System" > "DHCP" in the navigation area and on the "Static Leases" tab in the
content area.
2. For "Pool ID", select "1".
3. For "Identification Method", select the entry "Ethernet MAC".
4. In "Value", enter the MAC address of the NTP server.
5. Click "Create". A new row is created in the table.
SCALANCE M-800
Getting Started, 07/2020, C79000-G8976-C337-09
SCALANCE M-800 as DHCP server
2.3 Configuring static IP address assignment
Subnet mask
255.255.255.0
53