Network Interfaces; Ethernet Parameters - Digi TransPort User Manual

Network interfaces

The Configuration – Network> Interfaces menu offers the following options:
• Ethernet
• Mobile
• GRE
• Serial
• Advanced

Ethernet parameters

The Configuration - Network > Interfaces > Ethernet page opens to list configuration pages for
each of the available Ethernet instances on the unit. Each page allows the user to configure
parameters such as the IP address, mask, gateway, and others.
On units with only one Ethernet port, if more than one Ethernet instance exist these are treated
as logical Ethernet ports. These instances can be used to assign more than one Ethernet IP
address to a router.
On units with more than one physical Ethernet port, the Ethernet instances refer to the different
physical Ethernet ports. These units can be configured for either HUB mode or Port Isolate
mode.
In HUB mode all the Ethernet ports are linked together and behave like an Ethernet hub or
switch. This means that the router will respond to all of its Ethernet IP addresses on all of its ports
(as the hub/ switch behavior links the ports together).
In Port Isolate mode the router will only respond to its Ethernet 0 IP address on physical port LAN
0, its Ethernet 1 IP address on physical port LAN 1, etc. The router will not respond to its Ethernet
1 address on port LAN 0 unless routing has been configured appropriately.
When configured for HUB mode it is important that no more than one of the router's ports is
connected to another hub or switch on the same physical network otherwise an Ethernet loop
can occur. The default behavior is HUB rather than Port Isolate.
VLAN tagging is not available when the router is configured for Port Isolate mode.
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