Snmp Settings - D-Link DES-3528 Series Hardware Installation Manual

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xStack DES-3528/DES-3552 Series Layer 2 Managed Stackable Fast Ethernet Switch Hardware Installation Guide
The sample below illustrates a successful creation of a new administrator-level account with the user name
"newmanager".
DES-3528:admin# create account admin newmanager
Command: create account admin newmanager
Enter a case-sensitive new password: ********
Enter the new password again for confirmation: ********
Success.
DES-3528:admin#

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 Switch supports SNMP versions 1, 2c, and 3. You can specify which version of 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.
SNMP v.3 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 SNMP v.1 while assigning a higher level of security to another
group, granting read/write privileges using SNMP v.3.
NOTE: Passwords are case sensitive. User names and passwords can be
up to 15 characters in length.
Figure 4- 3. New administrator level account
NOTICE: CLI configuration commands only modify the running configuration file
and are not saved when the Switch is rebooted. To save all your configuration
changes in nonvolatile storage, you must use the save command to copy the
running configuration file to the startup configuration.
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