Digi TransPort LR54-AA401, Руководство пользователя

Страница: 46 / 169

Wide Area Networks (WANs)
TransPort LR User Guide 54
Configure a WAN interface
You can configure up to 10 WAN interfaces.
wan1 is the top priority, wan2 is the second priority, and so on.
The TransPort LR device automatically adds a default IP route for the WAN interface when it comes
up. The metric of the route is based on the priority of the interface. For example, as
wan1 is the
highest priority, the default route for wan1 has a metric of 1, and the default route for wan2 has a
metric of 2.
Required configuration items
Assign an Ethernet, DSL or Cellular interface to the WAN interface. By default, WAN interfaces are
assigned the following interfaces :
n
For TransPort LR devices with DSL:
l
wan1 : eth1
l
wan2 : dsl
l
wan3 : cellular1
l
wan4 : cellular2
n
For TransPort LR devices without DSL:
l
wan1 : eth1
l
wan2 : cellular1
l
wan3 : cellular2
Additional configuration options
These additional configuration settings are not typically configured, but you can set them as needed:
n
The IP configuration. WAN interfaces typically get their IP address configuration from the
network, for example, DSL or cellular, to which they connect. However, you can manually set
the IP configuration as needed. The following manual configuration settings are available:
l
IP address and mask
l
Gateway
l
Preferred and alternate DNS server
n
Disable the DHCP client. Ethernet interfaces use DHCP client to get an IP address from a
DHCP server, for example, from a cable modem. If you are manually configuring the IP
address for the Ethernet interface, disable the DHCP client.
n
Network Address Translation (NAT). NAT translates IP addresses from a private LAN network
to a public IP address. By default, NAT is enabled. Unless your LAN has a publicly-addressable
IP address range, do not disable NAT.
n
Maximum Transmission Unit (MTU). The MTU defines the maximum size of a packet sent over
the WAN interface.