Snmp User Table - D-Link xStack DES-3800 Series User Manual

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.
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 and sends them to the trap recipient (or network manager). Typical
traps include trap messages for Authentication Failure, Topology Change and Broadcast\Multicast
Storm.
MIBs
The Switch in the Management Information Base (MIB) stores management and counter information.
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. Specifying the MIB Object Identifier may also retrieve the proprietary
MIB. MIB values can be either read-only or read-write.
The DES-3800 Series 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-3800 Series 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.

SNMP User Table

The SNMP User Table displays all of the SNMP User's currently configured on the Switch.
xStack DES-3800 Series Layer 3 Stackable Fast Ethernet Managed Switch
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