We have a gremlin in the system where users often can't log into the windows domain around 4 AM. The problem clears up around 5 AM. I'd like to setup some sort monitor on a couple routers to validate connectivity our netapp and our dns servers overnight. How can I configure an IP SLA or something to test connectivity every 10 seconds or so, then issue a syslog message with if the test fails? Then during the day we can analyse exactly the resutls..
Hopefully the results of this monitoring would give us a clue as to what is going on.