Cabletron Systems SmartSTACK ELS100-24TXM Installation And User Manual

Also see for SmartSTACK 100 ELS100-24TXM: User guide addendum

Contents

68 SNMP Management ELS100-24TXMThere are three main operations defined in SNMP:• Operations that read information from the managed device, such asthose used to obtain status or statistical data, are called GEToperations.• Operations that change a functional parameter on the device, suchas those used to configure Spanning Tree or to initiate a softwaredownload, are referred to as SET operations. GET and SEToperations are initiated only by the manager software, and result in aresponse by the agent.• The third operation type, the TRAP, allows the agent to send anunsolicited message to the manager. This operation is typically usedas an alert of a potential problem or a change of status with thedevice. The Trap Destination parameter in the SNMP ConfigurationMenu is used to configure the IP addresses of the SNMP Manager towhich ELS100-24TXM trap messages are sent.MIB ObjectsA number of standard MIB specifications have been defined for managingnetwork equipment. SNMP compliant devices typically support one ormore standard MIBs defined by the Internet Engineering Task Force(IETF), in the form of Request for Comments (RFC) documents.These MIBs provide a common method of managing devices, such asswitches and hubs, and network interfaces, such as Ethernet and tokenring. The primary standard MIB, referred to as MIB-II, provides an overallview of the managed agent and must be supported, at least in part, by allSNMP agents. In addition, proprietary MIB extensions are defined bycommercial vendors for managing device-specific functions of theirproducts.The ELS100-24TXM switch supports four standard MIBs:• RFC 1213 - Management Information Base for NetworkManagement of TCP/IP based Internets (MIB-II)• RFC 1398 - Definitions of Managed Objects for the Ethernet-likeInterface Types (Ethernet MIB)• RFC 1493 - Definitions of Managed Objects for Bridges• RFC 1757 - Remote Network Monitoring Management InformationBaseThe ELS100-24TXM switch also supports Cabletron Systems proprietaryMIB extensions.RFC 1213 (MIB-II)RFC 1213 provides management of switch system-level parameters,including TCP/IP protocol-related statistics, IP addressing, routing tableinformation, and interface statistics for each switch port. MIB-II is thestandard MIB defined by RFC 1213. All agent devices operating SNMPare required to support at least part of MIB-II.