ZyXEL Communications GS1920v2 Series User Manual page 148

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 59 SNMP System Traps
OPTION OBJECT LABEL
coldstart coldStart
warmstart warmStart
Table 60 SNMP Interface Traps
OPTION OBJECT LABEL
linkup linkUp
linkdown linkDown
lldp lldpRemTablesChange
Chapter 24 SNMP
OBJECT ID
1.3.6.1.6.3.1.1.5.1
1.3.6.1.6.3.1.1.5.2
OBJECT ID
1.3.6.1.6.3.1.1.5.4
1.3.6.1.6.3.1.1.5.3
1.0.8802.1.1.2.0.0.1
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DESCRIPTION
This trap is sent when the Switch is turned on.
This trap is sent when the Switch restarts.
DESCRIPTION
This trap is sent when the Ethernet link is up.
This trap is sent when the Ethernet link is
down.
The trap is sent when entries in the remote
database have any updates.
Link Layer Discovery Protocol (LLDP), defined
as IEEE 802.1ab, enables LAN devices that
support LLDP to exchange their configured
settings. This helps eliminate configuration
mismatch issues.