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(Figure 6.6.2.3)
6.6.3 SNMP configuration
Introduction of SNMP
SNMP (Simple Network Management Protocol) is an internet-standard protocol for managing devices on
IP networks. It is used mostly in network management systems to monitor network-attached devices for
conditions that warrant administrative attention.
Work Mechanism of SNMP
SNMP includes 2 parts: NMS and Agent:
NMS: Network Management Station. Software runs on the manager. The common management
platforms are "Quid View", "Sun Net Manager" and "IBM Net View". Agent is the software of the server
running in the network device.
NMS can send "Get Request", "Get Next Request" and "Set Request" message to Agent. After Agent
gets those messages, it will read or write according to the message type to create Response message
and send the Response message back to NMS. Agent will also send Trap message to NMS when the
device is abnormal.
SNMP supports 3 kinds of basic operating in total:
Get:
Manager can use this to get some variable value of Agent.
Set:
Manager can use this to set up some variable value of Agent.
Trap:
Agent uses this to send an alarm to manager.
SNMP Version
Currently SNMP Agent of the device supports SNMP V3 and it is also compatible with SNMP V1and
SNMP V2C. It is authenticated by user name and password in SNMP V3.
SNMP V1 and SNMP V2C adopt authentication of Community Name. The SNMP message of the
community name which is not authenticated will be discarded. SNMP community name defines the
relationship of SNMP NMS and SNMP Agent. User can choose the following one or more features related
to community name.
1. Defines MIB view of community name.