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Chapter 26 SNMP
XS3800-28 User’s Guide
192
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.
Supported MIBs
A MIB is a collection of managed objects that is organized according to hierarchy. The objects define
the attributes of the managed device, which includes the names, status, access rights, and data types.
Each object can be addressed through an object identifier (OID).
An OID that begins with
“ 1.3.6.1.4.1.890.1.15 ” is a Zyxel-defined private MIB. Otherwise, it is a standard MIB OID.
MIBs let administrators collect statistics and monitor status and performance. The Switch uses both
standard public (RFC-defined) MIBs for standard functionality, and private MIBs that support additional
Switch functionality. Private MIBs contain Switch specific managed objects.
To view a list of standard MIBs supported by your Switch, see the product datasheet at www.zyxel.com
(
Support > Download Library > Datasheet ).
To get the private MIBs supported by your Switch, download (and unzip) the correct model MIB from
www.zyxel.com (
Support > Download Library > MIB File ).
SNMP Traps
The Switch sends traps to an SNMP manager when an event occurs. The following tables outline the
SNMP traps by category.
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 zyHwMonitorFanSpeedOutOfR
ange 1.3.6.1.4.1.890.1.15
.3.26.2.1 This trap is sent when the fan speed goes
above or below the normal operating
range.
zyHwMonitorFANSpeedOutOfR
angeRecovered 1.3.6.1.4.1.890.1.15
.3.26.2.7 This trap is sent when the fan speed is
recovered from the out of range to normal
operating range.
zyHwMonitorFanSpeedChang
eDueToDetection 1.3.6.1.4.1.890.1.15
.3.26.2.13 This trap is sent when the Switch changes the
fan speed due to SFP transceiver
overheating.
temperature zyHwMonitorTemperatureOut
OfRange 1.3.6.1.4.1.890.1.15
.3.26.2.2 This trap is sent when the temperature goes
above or below the normal operating
range.
zyHwMonitorTemperatureOut
OfRangeRecovered 1.3.6.1.4.1.890.1.15
.3.26.2.8 This trap is sent when the temperature is
recovered from the out of range to normal
operating range.