60 Function Description
WAGO-I/O-SYSTEM 750
750-8207 PFC200 CS 2ETH RS 3G
Manual
Draft version 1.2.1 from 2017-09-13, valid from FW Version 02.06.20(09)
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4.1.3
Network Configuration
4.1.3.1 Host Name/Domain Name
Without a host name configuration, the controller is assigned a default name
which includes the last three values of the controller's MAC address, e.g.,
“PFCx00-A1A2A3.” This name is valid for as long as a host name was not
configured, or host name was not supplied to the controller via DHCP (for
configuration of the controller see Section “Startup” > “Configuring”). 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 there are multiple
network interfaces with DHCP, the last received host name is valid. If only the
configured name is to be valid, the network administrator must adjust the
configuration of the active DHCP server so that no host names are transferred 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.
4.1.3.2 Default Gateways
In the TCP/IP configuration, the controller allows the setting of two default
gateways. 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.
The default gateways are assigned a so-called metric which specifies the time
delay, sometimes called the cost factor, with which a data packet can be routed
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. The gateway is determined randomly if
multiple gateways have the same metric. 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 set for the controller. 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.
The entries for
Destination Address
und
Destination Mask
make it possible to
define a complete route.
