D-Link DES-3326SR Layer 3 Switch
Figure 2 - 3. Assigning the Switch an IP Address
In the above example, the Switch was assigned an IP address of 10.10.1.100 with a subnet mask of 255.0.0.0.
The system message
Success
indicates that the command was executed successfully. The Switch can now be
configured and managed via Telnet and the CLI or via the Web-based management.
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 DES-3326SR 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
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