Need to run a script on gateway failover

[opoplawski]

I need to run a script on gateway failover in order to do some additional DDNS updates not possible with the default configurations. I'm exploring some possible alternatives:

• devd - but not sure if there is an IFNET event associated with changing routes

• Write a package that installs a plugins item to catch the plugin_gateway event. This seems promising, but wondering if anything like this has already been done?

Any other suggestions would be greatly appreciated.