GS-4012F/4024 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:

Table 78 SNMP Commands

COMMAND

DESCRIPTION

 

 

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.

 

 

33.3.1 Supported MIBs

MIBs let administrators collect statistics and monitor status and performance.

The switch supports the following MIBs:

•SNMP MIB II (RFC 1213)

•RFC 1157 SNMP v1

•RFC 1493 Bridge MIBs

•RFC 1643 Ethernet MIBs

•RFC 1155 SMI

•RFC 2674 SNMPv2, SNMPv2c

•RFC 1757 RMON

•RFC 1253 OSPF MIBs

•SNMPv2, SNMPv2c or later version, compliant with RFC 2011 SNMPv2 MIB for IP, RFC 2012 SNMPv2 MIB for TCP, RFC 2013 SNMPv2 MIB for UDP

33.3.2SNMP Traps

The switch sends traps to an SNMP manager when an event occurs. SNMP traps supported are outlined in the following table.

Table 79 SNMP Traps

OBJECT LABEL

OBJECT ID

DESCRIPTION

 

 

 

SNMPv2 Traps

 

 

 

 

 

Cold Start

1.3.6.1.6.3.1.1.5.1

This trap is sent when the switch is turned on.

 

 

 

WarmStart

1.3.6.1.6.3.1.1.5.2

This trap is sent when the switch restarts.

 

 

 

linkDown

1.3.6.1.6.3.1.1.5.3

This trap is sent when the Ethernet link is down.

 

 

 

linkUp

1.3.6.1.6.3.1.1.5.4

This trap is sent when the Ethernet link is up.

 

 

 

Chapter 33 Access Control

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