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GS-3012/GS-3012F User’s Guide
Access Control 24-3
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 24-2 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.
24.3.1 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 SNMPv2, SNMPv2c
RFC 2863 if-mib Bridge extension MIBs RFC 2674
RFC 2925 Ping and trace route
24.3.2 SNMP Traps
The switch sends traps to an SNMP manager when an event occurs. SNMP traps supported are outlined in the
following table.
Table 24-3 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 ES-3124 is turned on.
WarmStart 1.3.6.1.6.3.1.1.5.2 This trap is sent when the ES-3124 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.
authenticationFailure 1.3.6.1.6.3.1.1.5.5 This trap is sent when an SNMP request comes from non-
authenticated hosts.
RFC 1493 Traps
newRoot 1.3.6.1.2.1.17.0.1 This trap is sent when the STP root switch changes.
topology change 1.3.6.1.2.1.17.0.2 This trap is sent when the STP topology changes.