Protocol OverviewNetwork management stations use SNMP to retrieve or alter management data from network elements.A datum of management information is called a managed object; the value of a managed object can be staticor variable. Network elements store managed objects in a database called a management information base(MIB).MIBs are hierarchically structured and use object identifiers to address managed objects, but managedobjects also have a textual name called an object descriptor.Implementation InformationThe following describes SNMP implementation information.• The Dell Networking OS supports SNMP version 1 as defined by RFC 1155, 1157, and 1212, SNMP version2c as defined by RFC 1901, and SNMP version 3 as defined by RFC 2571.• The system supports up to 16 trap receivers.• The Dell Networking OS implementation of the sFlow MIB supports sFlow configuration via SNMP sets.• SNMP traps for the spanning tree protocol (STP) and multiple spanning tree protocol (MSTP) statechanges are based on BRIDGE MIB (RFC 1483) for STP and IEEE 802.1 draft ruzin-mstp-mib-02 forMSTP.Configuration Task List for SNMPConfiguring SNMP version 1 or version 2 requires a single step.NOTE: The configurations in this chapter use a UNIX environment with net-snmp version 5.4. Thisenvironment is only one of many RFC-compliant SNMP utilities you can use to manage your DellNetworking system using SNMP. Also, these configurations use SNMP version 2c.• Creating a CommunityConfiguring SNMP version 3 requires configuring SNMP users in one of three methods. Refer toSetting Up User-Based Security (SNMPv3).Related Configuration Tasks• Managing Overload on Startup• Reading Managed Object Values• Writing Managed Object Values• Subscribing to Managed Object Value Updates using SNMP• Copying Configuration Files via SNMPSimple Network Management Protocol (SNMP) 1042
