Allied Telesis AT-S101 - Manual (Page 100)

Chapter 8: Simple Network Management Protocol (SNMP)
100
SNMP Overview
You can manage a switch by viewing and changing the management
information base (MIB) objects on the device with the Simple Network
Management Program (SNMP). The AT-S101 Management Software
supports SNMPv1 and SNMPv2c.
To manage a switch using an SNMP application program, you must do the
following:
ˆ Activate SNMP management on the switch. The default setting for
SNMP management is disabled.
ˆ Load the Allied Telesis MIBs for the switch onto your management
workstation containing the SNMP application program. The MIBs are
available from the Allied Telesis web site at www.alliedtelesis.com.
To manage a switch using SNMP, you need the IP address of the switch
and at least one of the switch’s community strings.
Traps
A trap is a message sent by the switch to a management workstation or
server to signal an operating event, such as when the device is reset.
An authentication failure trap is similar to other the traps. It too signals an
operating event on the switch. But this trap is somewhat special because it
relates to SNMP management. A switch that sends this trap could be
indicating an attempt by someone to gain unauthorized management
access using an SNMP application program to the switch. There are two
events that can cause a switch to send this trap:
ˆ An SNMP management station attempts to access the switch using an
incorrect or invalid community name.
ˆ An SNMP management station tried to access a closed access
community string, to which its IP address is not assigned.
Given the importance of this trap to the protection of your switch, the
management software allows you to disable and enable it separately from
the other traps. If you enable it, the switch sends this trap if either of the
above events occur. If you disable it, the switch does not send this trap.
The default is disabled.
If you enable this trap, be sure to add one or more IP addresses of trap
receivers to the community strings so that the switch will know where to
send the trap if it needs to.