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Tab
Option
DHCP
Configuration of the DHCP/DNS server:
DHCP server
active on:
Domain name:
Forward DNS to
external:
1888
Meaning
Activation of the DHCP server and configuration of the Ethernet
interface. Also activates other services, such as DNS or NTP. The
option appears dimmed if the MC has only one Ethernet interface.
Selection of the interface on which the DHCP server is to start.
The primary interface (eth0) cannot be selected here. The
primary interface can be selected on the first tab Computer name.
If the MC has two interfaces, the non-primary interface appears
dimmed here. The interface used here must have a static IP
address and network mask. This is necessary because the
address range of the dynamic IP addresses of the DHCP server
is derived from this IP address and network mask.
IP addresses as of:
Defines which IP addresses are output by the DHCP server. The
values that appear dimmed are transferred from the static IP
address of this network interface of the MC. The number of
segments that are appear dimmed in the IP-range setting is
defined in the network mask of the static IP address of the
network interface (Interfaces tab -> Configure). The start
(lowest IP address) of the dynamically used IP address range is
defined here.
IP addresses up to:
Definition of the highest IP address of the dynamically used IP
address range. The IP addresses are not retrieved in consecutive
order.
Lease Time (seconds):
Lease Time is the time during which an IP address is reserved
for a client. If the client logs on again within this time, he will
definitely be assigned the same dynamic address again. During
operation, a client automatically extends the validity of the
assigned dynamic IP address.
This means that if a client is switched off longer than the Lease
Time, it can happen that the dynamic IP address is used for
another client.
Here you can enter the name of the internal network. The name is
required, for example, to distinguish devices in the internal
network from devices with the same name in an external network,
or if you want to access the internal network from devices in an
external network. The domain name can be chosen freely or you
can select one of the three suggestions (machine.net, tnc.net or
<hostname>-net.com) using the arrow.
This option can only be selected if the IP-Forwarding option has
also been selected on the Interfaces tab. If this option is
activated, the name resolution for the devices in the internal
network can also be used by devices in the external network. The
option is required, for example, if you want to reach a device in the
internal network with dynamic IP address from a PC in the external
network by using the host name of the device.
HEIDENHAIN Technical Manual iTNC 530 HSCI
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