
Appendix A. Understanding SNMP
MIB
This is an index to the organized data within a network device. It defines the operating parameters that can be controlled or monitored. When requesting the network manager to retrieve or modify a particular piece of infor- mation about a network device, the network manager transmits the request to that network device. The agent in that device interprets the incoming request, performs the requested task, and sends its response to the network manager. The network manager collects all the data from the various network devices and presents it in a consis- tent form.
Commands
Using SNMP Version 1, the network manager can issue three types of commands:
GetRequest
Retrieves a single item or the first in a series from a net- work device.
GetNextRequest
Retrieves the next item in a series from a network device.
SetRequest
Writes information to a network device.
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