WAGO I/O System 750 Manual page 65

WAGO I/O System 750
750-8210/040-000 PFC200; G2; 4ETH; XTR
On the basis of the target system configuration, consisting of the destination
address and destination mask, a decision is made about which gateway a
network data packet should be forwarded to. The target system can be specified
through an individual IP address or an IP address range. For a network data
packet to forward, the routing entry with the most specific destination address
and destination mask entries is always selected. The default gateway
corresponds to the least specific routing entry. All network data packets such that
no specific routing entry exists for their destination address and destination mask
are sent to this default gateway.
Default gateway:
Default gateways, also called default routes, are always set in connection with
the IP configuration.
Each default gateway has a metric that is unique among all default gateways.
Bridge <n> has the metric 19+<n>.
A default gateway can also be defined via the routing configuration, e.g., to
define an individual metric. The value "default" must be set for "Destination
Address" and the value "0.0.0.0" for Destination Mask.
Route:
If an IP address or IP address range is entered in the "Destination Address" field,
then all network data packets that are directed to the network address or network
address range are sent to the gateway address corresponding to the entry.
Alternatively, a bridge, a modem or a VPN interface can be specified in the
"Interface" field, via which all data packets that are directed to the destination
address are routed. Specifying an interface is optional. However, either a
gateway address, an interface or both must be specified.
If the IP address of the gateway is outside the IP address space that the
controller can reach, the associated route is not enabled. This also applies to
routes in which an interface is specified, which e.g., is not enabled in the current
bridge configuration.
A metric is assigned to each routing entry. If multiple routing entries are
configured for the same destination address and destination mask, the metric
specifies how the routing entries are prioritized. In this case, routing entries with a
lower value for the metric are preferred over routing entries with a higher metric
value. The metric value of the configured routing entries can be specified for the
controller.
Besides the manually configurable routes, default gateways can also be set via
DHCP replies. A unique metric is assigned to all default gateways assigned by
DHCP.
The metric is assigned starting at 10 and depends on the network interface via
which the DHCP response was received. The metric is assigned in ascending
order based on the alphanumeric sorting of the network interface names (e.g.,
br0, br1, ... wwan0).
Metric example:
A controller obtains its IP configuration via a DHCP server and receives both the
Version 1.7.0, valid from FW Version 04.01.10(23)
Functions 65
Manual