Snmp - Supermicro SSE-F3548S User Manual

11 SNMP

SNMP helps to monitor and manage the switches from network management systems (NMS). SNMP
solutions contain three major components – SNMP manager, SNMP agent and MIB (Management
Information Base) as shown in Figure – SNMP-1.
The SNMP MIB contains all the configuration and status information of the switch. MIB is organized in a
tree structure with branches and leaf nodes. Each node contains an object of information and is identified
with an object identifier (OID). SNMP MIB is stored and maintained in the switch.
The SNMP agent also resides on the switch. It processes the SNMP requests received from the SNMP
manager. It sends responses to SNMP managers by retrieving required information from the MIB. It also
updates the MIB based on SNMP messages sent by the SNMP managers. SNMP agents also send
voluntary traps to SNMP managers. Traps are sent to alert the SNMP managers on events happening on
the switch.
The SNMP manager is an NMS application. It monitors and manages switches by communicating to the
SNMP agents running on the switch. The SNMP manager application provides command or graphical
interfaces to the network administrators to help them manage the networks.
Figure SNMP-1: SNMP Systems
SNMP Messages
SNMP
Manager
There are three versions of SNMP protocols available.
SNMPv1
First version
of SNMP
protocol
USM (User based Security Model) and VACM (View based Access Control Model) are the main features in
SNMPv3. USM provides user authentication and message encryption. VACM provides MIB access control
by associating views and users.
SNMPv2c
* Improvements over SNMPv1
* Community string based administration
* 64 bit counters support
* getbulk support to retrieve large info
* Introducedinform messages
* Improved error handling
Supermicro SSE-F3548S/SSE-F3548SR Configuration User's Guide
SNMP
AGENT
MIB
Switch
SNMPv3
Improvements over
SNMPv2c
Improved authentication -
based on SNMP engine ID
Improved security -
encrypted information
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