CiscoWorks DFM actively monitors different conditions through Internet Control Message Protocol (ICMP) polling, Simple Network Management Protocol (SNMP) MIB interrogation, and SNMP trap reception. It tracks and analyzes conditions known to cause higher-level problems.
If CiscoWorks DFM receives information from the device that does not relate to a higher-level problem, it will not issue an alert, minimizing the need for IT managers to look at every network event. This provides the opportunity for IT managers to proactively manage Cisco device faults.
CiscoWorks DFM can easily recognize if a series of events from a device are related. For example, if a series of ports on a switch are down, instead of flooding your event screen with multiple port-down alerts, CiscoWorks DFM will recognize that these ports are on the same module and tell the user that the module is down. If the condition continues, users will not receive separate notifications; CiscoWorks DFM will increment the existing module-down problem.
As part of its analysis, CiscoWorks DFM continually analyzes the availability of Cisco devices and ports on the devices, but it also looks for specific problems within the device, including:
• Chassis-backplane usage
• Fan-fan state not normal
• Memory-excessive fragmentation, buffer miss rate, buffer usage, free memory
• Network adapters-backup activated, error rates at the system and VLAN level, broadcast rates, collision rates, discard rates, flapping, maximum uptime, queue drop rates, and usage
• Power supplies-voltage out of range
• SNMP agent-unresponsive
• System-excessive restarts
• Temperature-temperature out of range