User`s guide

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Configuration Network > Interfaces > Ethernet
Underneath the Ethernet sub menus, there are configuration parameters for:
Physical Ethernet interfaces
Logical Ethernet interfaces
MAC address filtering
MAC address bridging between routers
Spanning Tree Protocol (RSTP)
VLANs
The Configuration - Network > Interfaces > Ethernet folder 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, etc.
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”.
Note:
VLAN tagging is not available when the router is configured for Port Isolate mode.
Configuration - Interfaces > Ethernet > ETH n
This initial view only shows basic IP address parameters. The choice is to obtain an IP
address by using a DHCP server or to manually configure the IP addressing for this
interface.
Description
This parameter allows you to enter a name for this Ethernet instance, to make it easier to
identify.
Get an IP address automatically using DHCP
Selecting this option enables the DHCP client on this interface.