SNMP (Simple Network Management Protocol) is a widely used protocol for monitoring the health and welfare of network equipment (e.g. routers). SNMP monitor devices can be computer, router, printer, ups or any other SNMP device.
SNMP in router implement SNMP v1, SNMP v2c and SNMP v3. We can download the MIB file directly from web interface. MIBs are Management Information Base's that describe the data structures that can be requested from SNMP device. We also can manage router via SNMP tool with the MIB file.