CNNCTTST

MikroTik RouterOS script providing a simple connection test via ICMP.

Add to a RouterOS Scheduler, for example:

/system/scheduler/add name=ConnTest disabled=yes on-event="/system script run \"connecttest.rsc\"" interval=3

(change parameters to your needs)

Parameters to set up in the script

At the top of the script, find the comment line 'setting up below' You'll need to configure three variables:

• setupDestIP IP-address of host/interface to check/monitor
• setupNextHopIP next hop's IP towards $setupDestIP
• revdMsgStr first few characters of log-msg, but reversed (for cleaner filtering in logs)

Parameters to tweak in RouterOS's script environment during runtime

• CNNCTTSTnextHopIP - for monitoring the connection to the next hop
• CNNCTTSTdestIP - the host or interface to monitor

Testing the setup

To see if the script works as intended, change CNNCTTSTnextHopIP or CNNCTTSTdestIP in the environment to addresses which wouldn't respond to a ping. This would result in an error condition, either by not performing the actual connection test (CNNCTTSTnextHopIP) or by reporting a (simulated) broken connection to the router's log.