Teltonika RUT240 User Manual page 52

The majority of the optoos coosist of tmiog aod other importaot parameters that help determioe the health of
your primary coooectoo. Regular health checks are coostaotly performed io the form of ICMP packets (Piogs) oo your
primary coooectoo. Wheo the coooectoo's state starts to chaoge (READY->NOT READY aod vice versa) a oecessary
amouot of failed or passed health checks has to be reached before the state chaoges completely. This delay is iosttuted
so as to mitgate "spikes" io coooectoo availabilityn but it also exteods the tme before the backup liok cao be brought up
or dowo.
Field Name
1. Health mooitor Ioterval
2. Health mooitor ICMP host(s)
3. Health mooitor ICMP tmeout
4. Atempts before failover
5. Atempts before recovery
7.2.2.3 How do I set up a backup link?
First we must select a maio liok aod choose ooe or two backup lioks io WAN sectoo. Theo push the "Edit" butoo
aod coofgure your WAN aod Backup Wao settiogs to your likiog. Click Save aod wait uotl the settiogs are applied. Now
io the Status -> Network Ioformatoo -> WAN page there should be a status iodicatoo for the backup WAN. If everythiog
is workiog correctly you should see somethiog like this:
The above picture shows the status for Backup WAN coofgured oo a wired maio liok. You cao oow simulate a
dowoed liok by simply uopluggiog your Etheroet WAN cable. Wheo you've dooe so you should see this:
Aodn if you plug the cable back io you shouldn agaion see this:
Sample ialue
Disable/5/10/20/30/60/120
Secoods
Disable/DNS Server(s)
/WAN GW/Custom
1/3/4/5/10 Secoods
1/3/5/10/15/20
1/3/5/10/15/20
Explanaton
The ioterval at which health checks are performed
Iodicate where to Piog for a health check. As there
is oo defoitve way to determioe wheo the
coooectoo to ioteroet is dowo for goodn you'll
have to defoe a host whose availability is that of
the ioteroet as a whole.
How loog to wait for ao ICMP request to come
back. Set a higher value if your coooectoo has
high lateocy or high jiter (lateocy spikes).
How maoy failed checks before your WAN
coooectoo is declared DOWN for good.
How maoy checks before your WAN coooectoo is
declared UP.
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