Siemens SIMATIC NET SCALANCE SC-600 - Page 157

Configuring with Web Based Management
4.4 "System" menu
SCALANCE SC-600 Web Based Management (WBM)
Configuration Manual, 10/2021, C79000-G8976-C475-03
157
Description
The page contains the following boxes:
• Keep Alive
When this is enabled, the IP address is retained in the event of a connection
breakdown and is not reset to 0.0.0.0. Keep Alive is enabled by default. When Keep
Alive is disabled, the IP address is reset to 0.0.0.0 in the event of a communication
breakdown.
• DHCP Client Configuration Request (Opt. 66, 67)
When enabled, the DHCP client uses the options to download the configuration file
(option 67) from the TFTP server (option 66). After the restart, the device uses the
data from the configuration file.
• DHCP Mode
Specify the type of identifier with which the DHCP client logs on with its DHCP
server.
– via MAC Address
Identification is based on the MAC address.
– via DHCP Client ID
Identification is based on a freely defined DHCP client ID.
– via System Name
Identification is based on the Device Name. If the device name is 255 characters
long, the last character is not used for identification.
– via IAID and DUID
With this, the DHCP client can log on with DHCP servers that support parallel
operation of IPv4 and IPv6.
The identification is via the IAID and the DUID and identifies precisely one IP
interface of the device.
IAID (Interface Association Identifier): At least one IAID is generated for each IP
interface. The IAID remains unchanged when the DHCP client restarts.
DUID (DHCP Unique Identifier): Uniquely identifies server and clients and applies
to all IP interfaces of the device. The DUID remains unchanged when there is a
restart.
The table has the following columns:
• Interface
Interface to which the setting relates.
• DHCP
Enable or disable the DHCP client for the relevant interface.
• IAID Value
Value with which the interface (DHCP client) identifies itself with the DHCP server.