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3 - 16 ONline Ethernet Management Module Installation and Operation Guide
Setting a Subnetwork Mask
The subnetwork mask is specific to each type of Internet class. Generally,
the subnetwork mask is a group of common characters appearing on the
left side of an IP Address (called the Network ID), while the host address is
the group of unique characters appearing on the right side of an IP
Address. For example, to set the subnetwork mask for a class C address
without subnetworks, enter the following command:
ONline> set device subnet_mask FF.FF.FF.00 all [ENTER]
The subnetwork mask for a class B device without subnetworks would be
set using the following command:
ONline> set device subnet_mask FF.FF.0.0 network_1 [ENTER]
Note that you can set separate subnetwork masks for each of the individual
networks on the concentrator backplane, or the same subnetwork mask
for all of the networks on the concentrator backplane.
Defining the Default Gateway
The default gateway is the IP Address of the gateway that receives and
forwards packets whose addresses are unknown to the local network. The
default gateway is useful when sending EMM alert packets to a
management workstation on a different network. For example, the
following command specifies that the gateway with address 195.3.6.58 is
to become the default gateway:
ONline> set device default_gateway 195.3.6.58 all [ENTER]
Note that you can set separate default gateways for each of the individual
networks on the concentrator backplane, or the same default gateway for
all of the networks on the concentrator backplane.