206 Configuring System InformationDefining SNMP ParametersSimple Network Management Protocol (SNMP) provides a method for managing network devices. Thedevice 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 bedefined for the device. The local engineID is by default set to the switch MAC address. This local engineID must bedefined so that it is unique within the network.For information on how to configure the local engine ID, see "SNMPGlobal Parameters."SNMP v1 and v2The SNMP agent maintains a list of variables, which are used to manage the device. The variables aredefined in the Management Information Base (MIB). The MIB presents the variables controlled by theagent. The SNMP agent defines the MIB specification format, as well as the format used to access theinformation over the network. Access rights to the SNMP agent are controlled by access strings.SNMP v3SNMP v3 also applies access control and a new traps mechanism to SNMPv1 and SNMPv2 PDUs. Inaddition, 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 forencryption. Either authentication is enabled on an SNMP message, or both authentication and privacyare enabled on an SNMP message. However privacy cannot be enabled without authentication.• Timeliness — Protects against message delay or message redundancy. The SNMP agent comparesincoming 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 systemto manage device features. SNMP v3 supports the following features:• Security• Feature Access Control• TrapsAuthentication 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 inthe tree view.SNMP Global ParametersUse the Global Parameters page to enable SNMP and Authentication notifications.To display the Global Parameters page, click System →SNMP →Global Parameters in the tree view.
