Get Alerts when Cisco router configuration has changed.

Using SNMP to alert your NMS of Cisco IOS configuration changes

To get alerted whenever someone changes your Cisco IOS router configuration. These commands alert your network management system (NMS)  and your NMS Server must alert you, by sending you a (email, SMS,Alert).

First, your Cisco router will need to be configured to point to your NMS. To do this, enter this command:

Router(config)# snmp-server host x.x.x.x {community string}

The x.x.x.x is the IP address of your NMS. The community string, configured for this device, on your NMS, and the router must match.

Next, you need to tell the router what you want it to alert you about. In our case, we want to be alerted to router configuration changes so we use the “trap config” option, like this:

Router(config)# snmp-server enable traps config

Configuring your SNMP Network Management Station (NMS)

So now that your Cisco router is sending your NMS an alert that the configuration has changed, the NMS needs to alert you. The point of the NMS is to be the “middle man” and be the place where you dispatch all these alert through various methods like email, SMS,or cell.

As there are so many different NMS options available. Use either Whatsup or OpenNMS. Whatsup is relatively inexpensive compared to a large enterprise NMS like HP Openview , SolarWind and  VMware Application.

Find More SNMP Traps :-http://www.cisco.com/en/US/tech/tk648/tk362/technologies_tech_note09186a0080094a05.shtml