D-Link 3312SR - Switch Spécifications télécharger pdf (Page 156)

DGS-3212SR Stackable Gigabit Layer 2 Switch

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

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 DGS-3212SR 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 DGS-3212SR 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.

Open the Management folder and then the SNMP Manager folder. Finally, click on the SNMP User Table link. This

will open the SNMP User Table window, as shown below.

Figure 6- 4. SNMP User Table window

To delete an existing SNMP User Table entry, click on the X icon below the Delete heading corresponding to the entry you

want to delete.

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D-Link 3312SR - Switch Spécifications Page 156