IronPort Systems ES-1528 User Manual

Chapter 18 SNMP

ES-1528 User’s Guide

SNMP itself is a simple request/response protocol based on the manager/agent model. The 
manager issues a request and the agent returns responses using the following protocol 
operations: 

MIBs let administrators collect statistics and monitor status and performance.
The switch supports the following MIBs:

• RFC 1213 SNMP MIB II 

• MIB II - System
• MIB II - Interface

• RFC 1398 MIB - Ether-like
• RFC 1157 SNMP v1
• RFC 1155 SMI
• RFC 2674 SNMPv2, SNMPv2c
• RFC 2819 RMON

• Group 1 (Statistics)
• Group 2 (History)
• Group 3 (Alarm)
• Gropu 4 (Event)

SNMP v3 adds the use of groups and users to enhance security for SNMP management. 
Groups are assigned access rights to SNMP objects. Users are members of groups and are 
therefore limited to the access rights the group has. In addition users can also be required to 
authenticate before conducting SNMP management sessions.

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Table 38   SNMP Commands

Get

Allows the manager to retrieve an object variable from the agent.

GetNext 

Allows the manager to retrieve the next object variable from a table or list within an 

agent. In SNMPv1, when a manager wants to retrieve all elements of a table from an 

agent, it initiates a Get operation, followed by a series of GetNext operations. 

Set

 Allows the manager to set values for object variables within an agent. 

Trap

 Used by the agent to inform the manager of some events.