A manager or management system is a separate entity that is responsible to communicate with the SNMP agent implemented network devices. This is typically a computer that is used to run one or more network management systems.
SNMP Manager’s key functions
- Queries agents
- Gets responses from agents
- Sets variables in agents
- Acknowledges asynchronous events from agents
A managed device or the network element is a part of the network that requires some form of monitoring and management e.g. routers, switches, servers, workstations, printers, UPSs, etc… Continue reading Basic Component about SNMP and their function
Subversion is a free/open source version control system (VCS). That is, Subversion manages files and directories, and the changes made to them, over time. This allows you to recover older versions of your data or examine the history of how your data changed. In this regard, many people think of a version control system as a sort of “time machine.”
Subversion can operate across networks, which allows it to be used by people on different computers. At some level, the ability for various people to modify and manage the same set of data from their respective locations fosters collaboration. Progress can occur more quickly without a single conduit through which all modifications must occur. And because the work is versioned, you need not fear that quality is the trade-off for losing that conduit—if some incorrect change is made to the data, just undo that change. Continue reading Apache Subversion – Enterprise class centralized version control for the masses
SNMP(Simple Network Management Protocol) is a standard TCP/IP protocol for network management. Network administrators use SNMP to monitor and map network availability, performance, and error rates.
To work with SNMP, network devices utilize a distributed data store called the Management Information Base (MIB). All SNMP compliant devices contain a MIB which supplies the pertinent attributes of a device. Some attributes are fixed (hard-coded) in the MIB while others are dynamic values calculated by agent software running on the device.
Enterprise network management software, such as Tivoli and HP OpenView, uses SNMP commands to read and write data in each device MIB. ‘Get’ commands typically retrieve data values, while ‘Set’ commands typically initiate some action on the device. For example, a system reboot script is often implemented in management software by defining a particular MIB attribute and issuing an SNMP Set from the manager software that writes a “reboot” value into that attribute. Continue reading Monitoring Health and Welfare Network Management with SNMP
NRPE (Nagios Remote Plugin Executor) allows you to remotely execute Nagios plugins on other Linux/Unix machines. This allows you to monitor remote machine metrics (disk usage, CPU load, etc.). NRPE can also communicate with some of the Windows agent addons, so you can execute scripts and check metrics on remote Windows machines as well. NRPE is hands down, the best remote plugin executor for Nagios. Continue reading Configure Nagios NRPE to Allow Monitoring Host Server with No Login SSH