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DES-3010F/DES-3010FL/DES-3010G/DES-3016/DES-3018/DES-3026 Fast Ethernet Switch Manual
46
SNMP Manager
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-3000 Switch Series 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.
SNMPv3 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 SNMPv1 while assigning a
higher level of security to another group, granting read/write privileges using SNMPv3.
Using SNMPv3 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 SNMPv3 in that SNMP messages may be encrypted. To read more about how to configure SNMPv3
settings for the Switch read the next section.
MIBs
Management and counter information are stored by the Switch in the Management Information Base (MIB).
The Switch uses the standard MIB-II Management Information Base module. Consequently, values for MIB
objects can be retrieved from any SNMP-based network management software. In addition to the standard
MIB-II, the Switch also supports its own proprietary enterprise MIB as an extended Management
Information Base. The proprietary MIB may also be retrieved by specifying the MIB Object Identifier. MIB
values can be either read-only or read-write.
The DES-3000 Series Switch incorporates a flexible SNMP management for the switching environment.
SNMP management can be customized to suit the needs of the networks and the preferences of the network
administrator. Use the SNMP V3 menus to select the SNMP version used for specific tasks.
The DES-3000 Series Switch supports the Simple Network Management Protocol (SNMP) versions 1, 2c,
and 3. The administrator can specify the SNMP version used 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.
SNMP settings are configured using the menus located on the SNMP V3 folder of the web manager.
Workstations on the network that are allowed SNMP privileged access to the Switch can be restricted with
the Management Station IP Address menu.