Interfaces Local Area Networks (LANs)
Digi Connect IT® 4 User Guide
148
About Local Area Networks (LANs)
A Local Area Network (LAN) connects network devices together in a logical Layer-2 network.
The following diagram shows a LAN connected to the ETH2 Ethernet device. Once the LAN is
configured and enabled, the devices connected to the network interfaces can communicate with each
other, as demonstrated by the ping commands.
Configure a Local Area Network (LAN)
Configuring a Local Area Network (LAN) involves configuring the following items:
Required configuration items
n A name for the interface.
Note If the interface name is more than eight characters, the name will be truncated in the
underlying network interface to the first six characters followed by three digits, incrementing
from 000. This affects any custom scripts or firewall rules that may be trying to adjust the
interface or routing table entries.
n The interface type: either Ethernet, IP Passthrough, or PPPoE.
n The firewall zone: Internal.
n The network device or bridge that is used by the LAN.
n The IPv4 address and subnet mask for the LAN. While it is not strictly necessary for a LAN to
have an IP address, if you want to send traffic from other networks to the LAN, you must
configure an IP address.
Note By default, LAN is set to an IP address of 192.168.2.1 and uses the IP subnet of
192.168.2.0/24. If the WAN Ethernet device is being used by a WANwith the same IP subnet,
you should change the default IP address and subnet of LAN1.
Additional configuration items
n Additional IPv4 configuration:
l The metric for IPv4 routes associated with the LAN.
l The relative weight for IPv4 routes associated with the LAN.
l The IPv4 management priority of the LAN. The active interface with the highest
management priority will have its address reported as the preferred contact address for
central management and direct device access.
l The IPv4 Maximum Transmission Unit (MTU) of the LAN.
l When to use DNS: always, never, or only when this interface is the primary default route.
l IPv4 DHCP server configuration. See DHCP servers for more information.
n IPv6 configuration:
l The metric for IPv6 routes associated with the LAN.
l The relative weight for IPv6 routes associated with the LAN.
l The IPv6 management priority of the LAN. The active interface with the highest
management priority will have its address reported as the preferred contact address for
central management and direct device access.
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