Fluke Network Router manual Appendix a Snmp, MIBs, OIDs, Communities

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User’s Guide – version 1.6

NetWatch

Appendix A: SNMP

SNMP, or Simple Network Management Protocol, is a widely used standard that allows network management software to query network devices for status and information regardless of the type of device and the software it runs. The original SNMP developed in 1988 is defined in RFC 1157, and the current version 3 is fully backwards compatible. NetWatch uses SNMP version 2c when available; otherwise it reverts to version 1.

MIBs

The SNMP standard defines a large number of properties organised into a hierarchy that describes virtually everything about a device that a network manager might want to know. This hierarchy is called a MIB or Management Information Base. The SNMP standard defines a large MIB called MIB2; this describes system properties, routing information, interface status and statistics and a lot more. A large number of standard extension MIBs exist; the Interface MIB is used by NetWatch when supported, since it offers better support for high capacity interfaces than the standard MIB.

SNMP offers a way for hardware and software vendors to supply their own device- specific information in the form of Enterprise MIBs; most vendors have their own MIBs in addition to supporting some of the standard MIB.

OIDs

Each value defined in a MIB is referenced by its OID or Object Identifier. This is a long sequence of numbers separated by dots. Each number in an OID describes a sub level of the MIB hierarchy, thus the OID for the sysDescr object is 1.3.6.1.2.1.1.1, which means

iso.org.dod.internet.mgmt.mib-2.system.sysDescr. Most of the standard MIBs you

will come across will be in the mib-2 group, and all of the enterprise MIBs are

underneath iso.org.dod.internet.private.enterprises.

Communities

The original version of SNMP used a very simple secret word scheme to protect the information available from a device. Most SNMP-compliant devices support two “communities”, one of which can read the value of any variable in the MIB and one that also allows setting the values that can be configured. The community is passed to

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Contents NetWatch Software License Agreement Other Restrictions Termination User’s Guide version NetWatch Definitions Support ServicesSupport Charges Undertakings by You Supplier’s UndertakingsLimitation of Liability and indemnity Intellectual Property RightsConfidential Information and Security MiscellaneousSupport Hours Exceptions to Support ServicesResponse Times Contents Reporting System Security Key Product Features Installing NetWatchIntroduction OverviewAccessing the User Interface Architecture OverviewNetWatch Monitoring System Alerting System NetWatch DatabaseWeb Front-end NetWatch Configuration Global System SettingsSetting up a Device Specifying DevicesSelect Service Types PingTCP Port Test Snmp Interface TestAlarms DiscoveryEditing Services Editing DevicesEnabling Data Archiving Data ArchivingDisabling Data Archiving Managing Visual Backgrounds NetWatch VisualisationVisual Backgrounds Supplied with NetWatch Click Add Node Drawing the VisualTo add an action to a Node\Link Using a NetWatch Visual Select Description AlignmentNode Colour Code System View Traffic between 2 NodesLink Colour Code System How NetWatch Alerting Works Alerting SystemWhat Can Trigger an Alert? Web Based Reports Receiving AlertsSyslog Email Recipient Setting up Alert ControllersSyslog Recipient Reporting System Syslog Messages Configuring Devices to Send Syslogs to NetWatch SyslogsSyslogs and NetWatch Enabling Syslog ReceptionUtilities Load Setting up a licenceManual Status Services, Discovery and Polling How NetWatch services workSnmp Interface Test service DiscoveryPage TCP Port Status service Ping Response Test service Receive Snmp Notifications serviceConfiguring services Response Time GraphingLevels of Security SecurityEnabling Security Appendix a Snmp MIBsOIDs CommunitiesWindows snmptrap.exe service NotificationsWindows Windows NTConfiguring Snmp on a Cisco Router Further InformationUser’s Guide version NetWatch Appendix B NetWatch And IIS Page Appendix C Integrating Netwatch and Netflow Tracker Appendix D Auto Discovery Discovery MethodsIP Address Range Filters Appendix E Third Party Software JspSmartUpload MySQL Jakarta Tomcat
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