KBC Networks ESML6-P3 User Manual

Page 38

Ethernet Switch User Manual

Manual_web_mgt_sw-ESML6-P3-Rev 1107

Page 37 of 51

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3.1.3.16

SNMP

Simple Network Management Protocol offers a frame structure for low level network
management. The SNMP is widely used to control various network devices. SNMP basic
functions include network performance monitoring, network error checking and analysis
and network device configuration. SNMP can be used to gather statistics, configuration
and testing for a network and also error detection and recovery functions.

An SNMP managed network consists of three key components: a managed device, an
agent (the software which runs on the managed device) and the Network Management
System (NMS) this is the software which runs on the manager. SNMP itself does not
define which information a managed system should offer, it uses available information
defined by Management Information Bases (MIBs). The MIBs describe the structure of
the management data of a device subsystem, they use a hierarchical namespace
containing Object Identifiers (OIDs) and each OID identifies a variable that can be read
or set via SNMP.

In SNMPv2, authentication of clients is performed by a community string which is a type
of password transmitted in clear text. A Trap is a function for the Agent issuing a
message to NMS instead of a response to a request to report emergency alarms. There
can be five Trap server stations.

Within this menu option there are 5 options: SNMP, V3 User Table, V3 Access Table, V3
Context Table and V3 Group Table.

SNMP

Set the SNMP State to ‘Enable’ to enable the SNMP protocol and enable V2 if SNMPv2 is
required, SNMPv3 is supported by default if the SNMP State is enabled. Set the Request
Port to between 1 and 65535, the default is 161, this is the UDP port number for listening
to SNMP requests.

The Management Station shows the IP address of the NMS connected to this device.

Set the Trap on-off to be either enabled or disabled, the Trap port ID to between 1 and
65535, the default being 162 to set the port number for sending Trap messages and the
Server IP addresses to set up the NMS IP addresses for receiving the trap messages.

Select to complete the configuration.