Snmp Settings - D-Link DGS-3312SR Product Manual

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 DGS-3312SR supports the SNMP versions 1, 2c, and 3. You can specify which version of the 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
DGS-3312SR Gigabit Layer 3 Switch
DGS-3312SR:4#create account admin newmanager
Command: create account admin newmanager
Enter a case-sensitive new password:********
Enter the new password again for confirmation:********
Success.
DGS-3312SR:4#
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.
16