218 Configuring System Information
Defining SNMP Parameters
Simple Network Management Protocol
(SNMP) provides a method for managing network devices. The
device supports SNMP version 1, SNMP version 2, and SNMP version 3.
NOTE: By default, SNMPv2 is automatically enabled on the device. To enable SNMPv3, a local engine ID must be
defined for the device. The local engineID is by default set to the switch MAC address, however when the switch
operates in a stacking mode, it is important to manually confi gure the local engineID for the stack. This local
engineID must be defined so that it is unique within the network. It is important to do this because the default
engineID in a stack is the MAC address of the master unit, which may cha nge if the master unit fails and another
unit takes over the stack. For information on how to configure the local engine ID, see "SNMP Global Parameters."

SNMP v1 and v2

The SNMP agent maintains a list of variables, which are used to manage the device. The variables are
defined in the
Management Information Base
(MIB). The MIB presents the variables controlled by the
agent. The SNMP agent defines the MIB specification format, as well as the format used to access the
information over the network. Access rights to the SNMP agent are controlled by access strings.

SNMP v3

SNMP v3 also applies access control and a new traps mechanism to SNMPv1 and SNMPv2 PDUs. In
addition, the
User Security Model (USM) is defined for SNMPv3 and includes:
•
Authentication
— Provides data integrity and data origin authentication.
•
Privacy
— Protects against disclosure of message content. Cipher-Bock-Chaining
(CBC) is used for
encryption. Either authentication is enabled on an SNM P message, or both authentication and priva cy
are enabled on an SNMP message. However privac y cannot be enabled without authentication.
•
Timeline ss
— Protects against message delay or message redundancy. The SNMP agent compares
incoming message to the message time information.
•
Key Management
— Defines key generation, key updates, and key use.
The device supports SNMP notification filters based on Object IDs (OID). OIDs are used by the system
to manage device features. SNMP v3 supports the following features:
•Security
•Feature Access Control
•Traps
Authentication or Privacy Keys are modified in the SNMPv3 User Security Model (USM).
Use the SNMP page to define SNMP parameters. To display the SNMP page, click System
→
SNMP in
the tree view.

SNMP Global Parameters

Use the Global Parameters
page
to enable SNMP and Authentication notifications.