D-Link DGS-1510-52X User Manual - Page 32

Traps, Management Information Base (MIB), traps include trap messages for Authentication Failure

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DGS-1510 Series Gigabit Ethernet SmartPro Switch Hardware Installation Guide The Switch supports SNMP versions 1, 2c, and 3. The administrator may specify which SNMP version to use to monitor and control the Switch. The three SNMP versions vary in the level of security provided between the management station and the network device. In SNMPv1 and SNMPv2, 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 SNMPv1 and SNMPv2 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, a group of SNMP managers can be created 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. 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. Management Information Base (MIB) 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. The proprietary MIB may also be retrieved by specifying the MIB Object Identifier. MIB values can be either read-only or read-write. NOTE: For customers interested in D-View, D-Link Corporation's proprietary SNMP management software, go to http://dview.dlink.com.tw/ and download the software and manual. 32

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DGS-1510 Series Gigabit Ethernet SmartPro Switch Hardware Installation Guide
32
The Switch supports SNMP versions 1, 2c, and 3. The administrator may specify which SNMP version to
use to monitor and control the Switch. The three SNMP versions vary in the level of security provided
between the management station and the network device.
In SNMPv1 and SNMPv2, 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 SNMPv1 and SNMPv2 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, a group of SNMP managers can be
created 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.
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.
Management Information Base (MIB)
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. The proprietary MIB may also be retrieved by specifying the MIB Object Identifier. MIB
values can be either read-only or read-write.
NOTE:
For customers interested in D-View, D-Link Corporation's proprietary SNMP
management software, go to
and download the software and
manual.