PRTG allows administrators to discern actual bandwidth usage in their network based on multiple parameters, such as IP addresses, port numbers, protocols, etc., using either packet sniffing or NetFlow collector sensors. A new article in our knowledgebase explains how this feature can be used to find out who (or what PC/Server) is causing traffic peaks and excessive bandwidth usage in a network.
When creating “Custom SNMP Sensors” in PRTG Traffic Grapher you need to choose between a “Delta counter (difference per period)” and a “Gauge counter (absolute value)”. Sometimes you may want to change this setting later.
Our latest knowledgebase article explains how to do it.
Today we have published a new beta version of PRTG V6.2. Our developers have recently worked on PRTG’s SNMP engine and optimized it heavily.
It can now query more SNMP values in less time and with less network load. Especially for installations with some hundred sensors or more (and for installations with small intervals, e.g. below 10 seconds) this new version requires less CPU load and causes less network traffic while showing better performance.
Download this beta (the beta expires Dec 12th 2007).
There are SNMP devices that sometimes change the OID for a specific counter. This is common for systems running Windows 2003. If this happens PRTG can not continue to monitor this counter and it is easiest to add a new sensor.
If the historic data needs to be bound to the new sensor in order to retain the monitoring structure please refer to our knoweldge base article Binding historic datasets to new sensors and recalculating historic data for an individual sensor.
Recently we came across the following three pretty notable pages provided by Cisco, allowing users to find Cisco MIBs and to discern OID segment almost at a glance.
We have had multiple queries regarding strange, respectively wrong readouts when monitoring certain ASA equipment. As we found out today, the problem is a bug in the 7.2 OS causing the SNMP iftable to forward erroneous return values to monitoring software, such as PRTG. Instead of graphing PER vlan values, this bug results in graphing the total number of untagged vlan packets for each vlan.
The IT publication WindowsIT Pro has included PRTG in its latest collection of dynamite freeware for your USB toolkit. See the press clipping.
Our latest press release reports about the latest survey results from users of PRTG Traffic Grapher. It reveals that bandwidth management software is a key component in preventing network downtime.
A new knowledgebase article has instructions what a user of PRTG Traffic Grapher can do when the “Live Graph” doesn’t show graph lines for the monitoring data although monitoring seems to work ok.
We have received sporadic error reports from users of our software PRTG Traffic Grapher where the program was not properly started “as a service” when the Windows GUI was closed.
In this case this new knowledgebase article has some instructions.