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Chapter 16 Remote MGMT
P-2304R-P1 Series User’s Guide
167
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:
• 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.
16.2.1 Supported MIBs
The ZyXEL Device supports MIB II that is defined in RFC-1213 and RFC-1215. The focus of
the MIBs is to let administrators collect statistical data and monitor status and performance.
16.2.2 SNMP Traps
The ZyXEL Device will send traps to the SNMP manager when any one of the following
events occurs:
16.2.3 System Timeout
There is a default system management idle timeout of five minutes (three hundred seconds).
The ZyXEL Device automatically logs you out if the management session remains idle for
longer than this timeout period. The management session does not time out when a statistics
screen is polling. You can change the timeout period in the SYSTEM General screen.
Table 74 SNMP Traps
TRAP # TRAP NAME DESCRIPTION
0 coldStart (defined in RFC-1215) A trap is sent after booting (power on).
1 warmStart (defined in RFC-
1215)
A trap is sent after booting (software reboot).
4 authenticationFailure (defined in
RFC-1215)
A trap is sent to the manager when receiving any SNMP
get or set requirements with the wrong community
(password).
6 whyReboot (defined in ZYXEL-
MIB)
A trap is sent with the reason of restart before rebooting
when the system is going to restart (warm start).
6a For intentional reboot : A trap is sent with the message "System reboot by user!"
if reboot is done intentionally, (for example, download
new files, CI command "sys reboot", etc.).
6b For fatal error : A trap is sent with the message of the fatal code if the
system reboots because of fatal errors.