I noticed, when installing the WiFi network bridge to the garden shed, that the DHCP client does not reconnect when the connection has been lost. It just sits there (don't know when it would reconnect, maybe when the lease expires?) unconnected. For my purpose, that's not very satisfying, as I need the connection to be robust.
Since I had worked with
monit before, I figured this would be a
great way to periodically check the state of the connection and
re-enable it when it has dropped out. At a later date,
also turn out to be helpful in making sure that all other services on
the router remain healthy.
Installing & configuring
opkg update # I am getting the packages from my local copy of the trunk, just to have it all be consistent. That probably is only critical for the kernel modules packages, but let's do it for sake of simplicity opkg install monit vi /etc/monitrc
I added some sensible settings from the template that is in
/etc/monitrc, mainly to start as a daemon, put the work files in
/tmp and set the frequency of the checks. And the check for a
check host kiprouter with address 10.0.0.4 if failed icmp type echo count 3 with timeout 3 seconds then exec "/etc/init.d/network restart"
Then to enable and start monit:
/etc/init.d/monit enable /etc/init.d/monit start
Testing results later...