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Chapter 27 Access Control
ES-2024 Series User’s Guide
199
27.3.1 SNMP v3 and Security
SNMP v3 enhances security for SNMP management. SNMP managers can be required to
authenticate with agents before conducting SNMP management sessions.
Security can be further enhanced by encrypting the SNMP messages sent from the managers.
Encryption protects the contents of the SNMP messages. When the contents of the SNMP
messages are encrypted, only the intended recipients can read them.
27.3.2 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
• 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
27.3.3 SNMP Traps
The Switch sends traps to an SNMP manager when an event occurs. The following tables
outline the SNMP traps by category.
An OID (Object ID) that begins with “1.3.6.1.4.1.890.1.5.8.16” (ES-2024A) or
“1.3.6.1.4.1.890.1.5.8.27” (ES-2024PWR) is defined in private MIBs. Otherwise, it is a
standard MIB OID.
Table 76 SNMP System Traps
OPTION OBJECT LABEL OBJECT ID DESCRIPTION
coldstart coldStart 1.3.6.1.6.3.1.1.5.1 This trap is sent when the Switch is
turned on.
warmstart warmStart 1.3.6.1.6.3.1.1.5.2 This trap is sent when the Switch
restarts.
fanspeed FanSpeedEventOn 1.3.6.1.4.1.890.1.5.8.16.27.2.1 This trap is sent when the fan speed
goes above or below the normal
operating range.
FanSpeedEventClear 1.3.6.1.4.1.890.1.5.8.27.27.2.2 This trap is sent when the fan speed
returns to the normal operating
range.
temperature TemperatureEventOn 1.3.6.1.4.1.890.1.5.8.16.27.2.1 This trap is sent when the
temperature goes above or below
the normal operating range.
TemperatureEventClear 1.3.6.1.4.1.890.1.5.8.27.27.2.2 This trap is sent when the
temperature returns to the normal
operating range.