Snmp Settings; Traps - D-Link DXS-3326GSR Manual

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SNMP Settings

Simple Network Management Protocol (SNMP) is an OSI Layer 7 (Application Layer) designed specifically for managing
and monitoring network devices. SNMP enables network management stations to read and modify the settings of
gateways, routers, switches, and other network devices. Use SNMP to configure system features for proper operation,
monitor performance and detect potential problems in the Switch, switch group or network.
Managed devices that support SNMP include software (referred to as an agent), which runs locally on the device. A
defined set of variables (managed objects) is maintained by the SNMP agent and used to manage the device. These objects
are defined in a Management Information Base (MIB), which provides a standard presentation of the information
controlled by the on-board SNMP agent. SNMP defines both the format of the MIB specifications and the protocol used to
access this information over the network.
The DXS-3326GSR supports SNMP versions 1, 2c, and 3. You can specify which version of SNMP you want to use to
monitor and control the Switch. The three versions of SNMP vary in the level of security provided between the
management station and the network device.
In SNMP v.1 and v.2, user authentication is accomplished using 'community strings', which function like passwords. The
remote user SNMP application and the Switch SNMP must use the same community string. SNMP packets from any
station that has not been authenticated are ignored (dropped).
The default community strings for the Switch used for SNMP v.1 and v.2 management access are:
public - Allows authorized management stations to retrieve MIB objects.
•
private - Allows authorized management stations to retrieve and modify MIB objects.
•
SNMP v.3 uses a more sophisticated authentication process that is separated into two parts. The first part is to maintain a
list of users and their attributes that are allowed to act as SNMP managers. The second part describes what each user on
that list can do as an SNMP manager.
The Switch allows groups of users to be listed and configured with a shared set of privileges. The SNMP version may also
be set for a listed group of SNMP managers. Thus, you may create a group of SNMP managers that are allowed to view
read-only information or receive traps using SNMP v.1 while assigning a higher level of security to another group,
granting read/write privileges using SNMP v.3.
Using SNMP v.3 individual users or groups of SNMP managers can be allowed to perform or be restricted from
performing specific SNMP management functions. The functions allowed or restricted are defined using the Object
Identifier (OID) associated with a specific MIB. An additional layer of security is available for SNMP v.3 in that SNMP
messages may be encrypted. To read more about how to configure SNMP v.3 settings for the Switch read the section
entitled Management.

Traps

Traps are messages that alert network personnel of events that occur on the Switch. The events can be as serious as a
reboot (someone accidentally turned OFF the Switch), or less serious like a port status change. The Switch generates traps
DXS-3326GSR Gigabit Layer 3 Switch
NOTICE: CLI configuration commands only modify the running
configuration file and are not saved when the Switch is rebooted. To save
all your configuration changes in nonvolatile storage, you must use the
save command to copy the running configuration file to the startup
configuration.
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