40 Function Description
e!DISPLAY 7300T
762-300X Web Panels
Manual
Version 1.1.0
4.4.3
Network Configuration
4.4.3.1 Host Name/Domain Name
If the host name is not configured, the panel receives a default name based on
the last three values of the panel's MAC address, e.g., “e!DISPLAY-A1A2A3”.
The name applies as long as no host name is configured or no host name is
given to the panel by DHCP (to configure the panel, see section “Commissioning”
> “Configuring in the Web-Based Management (WBM)”). When the host name is
set, a host name supplied by a DHCP response is immediately active and
displaces the configured or default host name. If only the configured name should
apply, the network administrator must adjust the configuration of the active DHCP
server, so that no host name is passed in the DHCP response.
The default host name or the configured name is active again if the network
interfaces are set to static IP addresses or if a host name is not received via the
DHCP response.
A similar mechanism is used for a domain name as for the host name. The
difference is that a default domain name is not set. As long as a domain name is
not configured or supplied by DHCP, the domain name is empty.
4.4.3.2 Default Gateways
Two default gateways can be set for the panel in the TCP/IP configuration. A
network station transmits to a default gateway all network data packets for
systems outside of its local network. This gateway is responsible for the
appropriate routing of the data packets, so that they reach the target system.
A so-called metric is assigned to the default gateways that specifies with what
time delay, sometimes called cost factor, a data packet can be forwarded via the
gateway. If multiple default gateways are configured, the operating system
transmits the data packets to the default gateway configured with the lowest
metric. If this gateway is not accessible, an attempt is made to access the
gateway with the next higher metric. If several of the gateways have the same
metric, the gateway is determined randomly. If this gateway cannot transmit the
data packet, the data packet is sent simultaneously to all other gateways of the
same metric.
The metric of the configured default gateways can be specified for the panel. The
default value for the metric is 20. Besides the directly configured gateways, other
gateways can be set via DHCP responses so that more than two gateways are
possible. All gateways transferred via DHCP are assigned a permanent metric of
10. The DHCP gateways are thus normally given priority on account of their low
metric.
4.5
Memory Card Functions
The memory card is optional and is used as an additional memory range for the
internal memory or drive in the panel. Device settings and the panel's firmware
can be saved on the memory card.
