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3 Connecting the interface
3.5 Configuration of the Ethernet interface
Configuration
on the
paperless
recorder
is carried out using the Configuration ➔ Interface ➔ Ethernet menu point.
Configuration
via the setup
program
is carried out using the Extras
➔ Ethernet interface menu point.
3.5.1 Parameters
DHCP DHCP (Dynamic Host Configuration Protocol) is used to ensure that the
paperless recorder is automatically assigned an IP address and further
communication parameters by a DHCP server.
The further communication parameters usually assigned to the paperless
recorder by the DHCP server include, among others, the subnet mask, the
standard gateway address and the so-called lease time.
After the lease time (period of use) has elapsed, the validity of the IP address
expires. To ensure that the paperless recorder always has a valid IP address,
after 50% of the lease time it transmits a query to the known DHCP server
asking whether or not the address is still valid. If the DHCP server cannot be
accessed, the paperless recorder repeats its query until 87.5% of the lease
time has elapsed. Then the paperless recorder transmits its query not only to
the DHCP server but also to the entire network. When the lease time has
elapsed and the IP address is still not acknowledged, the paperless recorder
declares the address as invalid and is no longer accessible via the net.
On DHCP is switched on, the paperless recorder obtains its
IP address by the DHCP server
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