ADVANTECH ICR-3200 Cellular Router Instruction Manual
ICR-3200
4.7 Backup Routes
Note that some interfaces, typically WiFi, ETH2, or ETH1, may not be available for some
router product lines or for the model you are currently using.
Typically, you want the router to direct traffic from the whole LAN (Local Area Network)
behind the router to an external WAN (Wide Area Network) outside, such as the Internet.
Backup Routes is a mechanism that enables customizing which router’s interfaces will be
used for communication to the WAN outside the router. The Backup Routes configuration
page is shown in Figure 31.
You may not care about this configuration and leave this process on the default router
mechanism. In this case, leave the Backup Routes configuration page as it is, unconfigured,
and the router will proceed as described in Chapter 4.7.1.
If you want to set up this feature your way, see Chapter 4.7.2 for more information.
4.7.1 Default Priorities for Backup Routes
By default, when the first checkbox, Enable backup routes switching, is unchecked, the
backup routes system is not user customized and operates with the default mechanism. In-
stead, the router selects a route to the WAN based on the default priorities.
The following is the list of the network interfaces in descending order from the highest
priority to the lowest priority interface for use as a WAN interface.
1. Mobile WAN (pppX, usbX)
2. PPPoE (ppp0)
3. WiFi STA (wlan0)
4. ETH1 (eth1)
5. ETH2 (eth2)
6. ETH0 (eth0)
For example, based on the list above, we can say that the ETH1 interface will only be used
as the WAN interface if Mobile WAN, PPPoE, and WiFI STA interfaces are down or disabled.
It is clear from the above that an interface connected to a LAN network can take over the
role of a WAN interface under certain circumstances. Possible communication from the LAN to
the WAN can be blocked or forwarded rules configured on the NAT and Firewall configuration
pages.
Note that an ETH interface won’t be used as WAN for the default backup route priorities
if it has no IP address configured or the DHCP client is disabled for this ETH interface.
Also, unplugging the Ethernet cable does not switch the route to the next one (true just
for the Default Priorities mode).
65
| General | Details |
|---|---|
| Name | ADVANTECH ICR-3200 Cellular Router Instruction Manual |
| Make | Advantech |
| Language | English |
| Filetype | PDF (Download) |
| File size | 3.17 MB |
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