ADC Telecommunications, Inc.162 C HAPTER 9: S IMPLE NETWORK M ANAGEMENT P ROTOCOL (SNMP)About SNMPThis section provides an overview of SNMP. For further information about theSNMP protocol, refer to the RFCs listed below or other general publicationsspecific to SNMP.SNMP is a network management protocol that provides a standard fornetwork management systems. In the SNMP scheme, a networkmanagement system contains two primary components: a manager andagents. The manager is the workstation or console where the networkadministrator performs network management functions. Agents are entitiesthat interface with the device being managed. The Cuda 12000 runs anSNMP agent.Devices, such as the Cuda 12000, that are managed using SNMP containmanaged objects, such as configuration parameters and performancestatistics. These objects are defined in a management information base(MIB). SNMP allows managers and agents to communicate for the purposeof accessing MIB objects.SNMP provides access control to MIB objects, which defines who can accessMIB objects and their associated access privileges. In SNMPv1 and v2c,access control is managed through associations of agents and managerscalled communities and security groups. In SNMPv3, access control ismanaged by the user and context, and an associated security group. Refer to“Configuring SNMP Access Control” on page 164 for more information onaccess control.SNMP security is defined by Security Models and Security Levels. Acombination of a security model and a security level determines whichsecurity mechanism is used when handling an SNMP packet. A securitymodel may authenticate messages by providing data integrity, data originauthentication, data confidentiality, message timeliness and limited replayprotection. A security model is set up for a user and the group in which theuser resides. A security level is the permitted level of security within a securitymodel. The level of security is determined primarily by the specific SNMPapplication implementation and by the specific security modelimplementation.The Cuda 12000 supports DOCSIS 1.1 OSS Interface Specification(SP-OSSIv1.1-I02-000714) and SNMP configuration, as defined by RFCs1157, 2571, 2572, 2573, 2574, 2575 and 2576.
