Snmp Global State Settings; Snmp Linkchange Traps Settings - D-Link xStack Reference Manual

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xStack DGS-3200 Series Layer 2 Managed Gigabit Ethernet Switch Web UI Reference Guide
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 privi-
leges 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 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 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 Settings 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 Global State Settings

SNMP global state settings can be enabled or disabled.
To view the following window, click Configuration > SNMP Settings > SNMP Global State Settings:
Figure 2 - 35. SNMP Global State Settings window
Click the Apply button to let your change take effect.

SNMP Linkchange Traps Settings

Users can set SNMP linkchange traps.
To view the following window, click Configuration > SNMP Settings > SNMP Linkchange Trap Settings:
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