Hirschmann RS20 User Manual page 45

Entering the IP Parameters
Option Meaning
12 Host Name
42 NTP server
61 Client Identifier
66 TFTP Server Name
67 Bootfile Name
Table 3: DHCP options which the device requests
The advantage of using DHCP instead of BOOTP is that the DHCP server
can restrict the validity of the configuration parameters ("Lease") to a specific
time period (known as dynamic address allocation). Before this period
("Lease Duration") elapses, the DHCP client can attempt to renew this lease.
Alternatively, the client can negotiate a new lease. The DHCP server then
allocates a random free address.
To help avoid this, DHCP servers provide the explicit configuration option of
assigning a specific client the same IP address based on a unique hardware
ID (known as static address allocation).
On delivery, DHCP is activated. As long as DHCP is activated, the device
attempts to obtain an IP address. If it cannot find a DHCP server after
restarting, it will not have an IP address. Activate or deactivate DHCP in the
Basic Settings:Network:Global
Note: When using Industrial HiVision network management, the user checks
to see that DHCP allocates the original IP address to each device every time.
The appendix contains an example configuration of the BOOTP/DHCP-
server .(see on page 190 "Setting up a DHCP/BOOTP Server")
Example of a DHCP-configuration file:
# /etc/dhcpd.conf for DHCP Daemon
#
subnet 10.1.112.0 netmask 255.255.240.0 {
option subnet-mask 255.255.240.0;
option routers 10.1.112.96;
UM BasicConfig L2E
Release 8.0 05/2013
2.6 System Configuration via DHCP
dialog.
45