You can use the Network Statistics Monitor to verify that various types of packet and connection statistic information for network protocols, such as IP, TCP, and UDP, are within the thresholds that you define as acceptable. By doing so, you can ensure that devices handle specific types of network data as expected.
For example, you can use the IP received discarded threshold monitor to watch for situations where a router with Quality of Service (QOS) has priorities set for Voice over IP (VoIP). In these situations, other IP datagrams that a router receives are buffered for delayed processing to give processing priority to the VoIP data. If the buffer space is overrun, lower priority IP datagrams are discarded even though the router initially received them. This example describes configuring and assigning a network statistic monitor that monitors thresholds set for IP data received by a router but discarded from the buffer. It also configures and assigns an Email Action to notify you if the monitor fails.
To configure a Network Statistics Monitor:
Cisco Router Buffer Overflow Monitor
.After configuring the IP received discarded monitor, you need to assign it to the device(s) that you want to check using the monitor. In the next steps of this example, you will assign the monitor to a single device, then using the Action Builder, configure and assign an Email Action to notify you when the monitor goes down.
Tip: You can also assign the monitor to multiple devices at one time via Bulk Field Change. For more information, see Assigning a monitor to multiple devices.
To assign the IP Received Discarded monitor, and configure and assign an Email Action:
Cisco Router Buffer Overflow Monitor
.%ActiveMonitor.Name has failed (%Device.HostName)
. This message indicates the device type, its down state, and the hostname of the device on which the monitor has failed.This %ActiveMonitor.Name has failed on %Device.Address.
Please check or restart the %Device.HostName.
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This mail was sent on %System.Date at %System.Time
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This message indicates that the device, such as a router, has reached the threshold where IP data has overrun the buffer and should be checked or restarted.
Tip: Optionally, you can add a link to the Device Status or Mobile Device Status report for the device to which the monitor is assigned.