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User manual
49
www.3onedata.com
6.8 Remote monitoring
6.8.1 SNMP management
1. 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.
2. 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.
3. 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.
2. Setup visit privilege of MIB objective is Write or Read. Community name with Read privilege can
check the device information only. Community name with Write privilege can configure the device.
3. Setup appointed basic visit control list of the community name.
IES6116 series supports SNMP V1/V2c. Both SNMP V1 and V2c use public character strings for
match authentication.
SNMP usually uses UDP Port 161(SNMP) and 162 (SNMP-traps) based on TCP/IP protocol. SNMP
protocol agent is existed in network device. MIB (information specific to the device) is uses as device
connector. These network devices can be monitored or controlled through the agent. When trap event
happens, a message is transmitted by SNMP Trap, an available trap receiver can get this trap
information.
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.