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Cisco Routers and Switches with L3 routing functions are seen to have problems with High CPU usage when SNMP is enabled. This can range anything from 15% to 40%. According to Cisco, these are low priority processes and other priority processes requiring CPU cycles are given priority over these processes and this level of CPU utilisation can be is normal. However, it is always better to be safe than sorry and get the CPU utilisation caused by SNMP to bare minimum so as to ensure the Routers function smoothly.

The reason behind the High CPU usage can be caused by the Network Management Server (SNMP Server) like HP Openview querying for the Routing Tables and ARP tables to learn about other networks  or querying for certain MIBs which can be resource intensive.

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Packet Trap pt360 Tool suite is a Windows based free Network Diagnostic tools suite and a Network Monitoring tool. Packet Trap has a nice Dashboard with drag and drop dashboard components.

At the first look, Packet Trap is very impressive, simple, easy to use, easy to understand, simple and easy navigation and menu options. All the diagnostic tools are graphic and provides a great advantage as a one stop shop for most of the Network troubleshooting. What is even more impressive is that the monitoring system being integrated into a Network Diagnostic suite which allows an admin to monitor and troubleshoot all from one place and they all can export the results in nice HTML format.

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SNMP helps monitoring your network devices wherein it can help a Monitoring System to query the device about various system health and/or modify configurations based on the permission it has on the device or on the other hand, allow the device itself to send alerts (known as trap in SNMP) to the management system of any system issues like a PSU failure.

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Kiwi CatTools automates configuration backups and management on routers, switches and firewalls. It provides e-mail notification and compare reports highlighting config changes. Supports Telnet, SSH, TFTP and SNMP.

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