Teltonika RUT240 User Manual page 52

The majority of the options consist of timing and other important parameters that help determine the health of
your primary connection. Regular health checks are constantly performed in the form of ICMP packets (Pings) on your
primary connection. When the connection's state starts to change (READY->NOT READY and vice versa) a necessary
amount of failed or passed health checks has to be reached before the state changes completely. This delay is instituted
so as to mitigate "spikes" in connection availability, but it also extends the time before the backup link can be brought
up or down.
Field Name
1. Health monitor Interval
2. Health monitor ICMP host(s)
3. Health monitor ICMP timeout
4. Attempts before failover
5. Attempts before recovery
7.2.2.3 How do I set up a backup link?
First we must select a main link and choose one or two backup links in WAN section. Then push the "Edit" button
and configure your WAN and Backup Wan settings to your liking. Click Save and wait until the settings are applied. Now
in the Status -> Network Information -> WAN page there should be a status indication for the backup WAN. If everything
is working correctly you should see something like this:
The above picture shows the status for Backup WAN configured on a wired main link. You can now simulate a
downed link by simply unplugging your Ethernet WAN cable. When you've done so you should see this:
And, if you plug the cable back in you should, again, see this:
Sample value
Disable/5/10/20/30/60/120
Seconds
Disable/DNS Server(s)
/WAN GW/Custom
1/3/4/5/10 Seconds
1/3/5/10/15/20
1/3/5/10/15/20
Explanation
The interval at which health checks are performed
Indicate where to Ping for a health check. As there
is no definitive way to determine when the
connection to internet is down for good, you'll
have to define a host whose availability is that of
the internet as a whole.
How long to wait for an ICMP request to come
back. Set a higher value if your connection has
high latency or high jitter (latency spikes).
How many failed checks before your WAN
connection is declared DOWN for good.
How many checks before your WAN connection is
declared UP.
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