What are the Basic Components of SNMP? | Cisco Systems Dial NMS

Overview of Basic SNMP Building Blocks

What are the Basic Components of SNMP?

Table 1	Related SNMP Documentation and Sites

Site Description		URL

SNMP Technology TAC Page—Network		http://www.cisco.com/pcgi-bin/Support/PSP/psp_vie
design tips, implementation and operation		w.pl?p=Internetworking:SNMP
guidelines, which are continually updated by
Cisco TAC engineers.

The SimpleWeb—Public domain software		http://penta.ufrgs.br/gereint/impl.htm
packages, which are available on the Internet.
Most of the software is a spin-off from SNMP
related research.

SNMP FAQ—Frequently asked questions		http://www.pantherdig.com/snmpfaq/
about SNMP.		http://www.faqs.org/rfcs/rfc1382.html

What are the Basic Components of SNMP?

An SNMP-managed network consists of three key components: managed devices, agents, and network management systems (NMS).

•Managed devices

`Contain an SNMP agent and reside on a managed network.

`Collect and store management information and make it available to NMS by using SNMP.

`Include routers, access servers, switches, bridges, hubs, hosts, or printers.

•Agent—A network-management software module, such as the Cisco IOS software, that resides in a managed device. An agent has local knowledge of management information and makes that information available by using SNMP.

•Network Management Systems (NMS)—Run applications that monitor and control managed devices. NMS provide resources required for network management. In the case study, the NMS applications are:

`UCD-SNMP

`MRTG

`HPOV

`CW2000 RME

Basic Dial NMS Implementation Guide

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Cisco Systems Dial NMS manual What are the Basic Components of SNMP?, Site Description, Snmp Technology TAC Page -Network

Contents

Basic Dial NMS Implementation Guide Basic Dial NMS Implementation Guide Audience What is SNMPv1? What is SNMPv2?Dial NMS Service Definition Scope Task 1-Enabling Snmp in a Cisco IOS Device Task 3-Using Mrtg to Monitor and Graph Traffic LoadsTask 5-Setting Up a Web Portal for the Dial NMS Enabling Snmp Task 8-Using CiscoWorks 2000 Resource Manager Essentials Task 6-Managing IP Addresses by Using DNSTask 7-Using HP OpenView to Create the Snmp Framework Using CiscoView Contents Basic Dial NMS Implementation Guide Scope PurposeAudience Bold ConventionsConvention Description Related Documentation and Sites Technical References and Support Internetworking Solutions Guides Cisco Connection Online Acknowledgements Documentation CD-ROMDocumentation Feedback About Snmp UCD-SNMP Snmp Technology TAC Page -Network What are the Basic Components of SNMP?Site Description Managed devices NMS What are Snmp MIBs? Vines What is SNMPv1? SNMPv1 and ASN1 Data Types What is SNMPv2? SNMPv1 Protocol Operations About Snmp Management SNMPv2 and SMI About Snmp Security Page Network Design for a Dial NMS Case Study Introduction to the Case Study Benefits of a Dial NMS Network Design Questions Answers Dial NMS Planning QuestionnaireTHEnet Accounting tools and database MrtgCustom-based AAA Query tools Dial NMS Service Definition Show modem version Show versionShow running Show interface accounting ` show modem connect-speeds ` show access-lists` show modem operational-status Show snmp group Network Topology for One POP Cisco AS5800 access servers Network Topology 101 50,000 5000 Lines / 1288 = 3.88 chassis AS5800s Hardware RequirementsHardware Purpose Uses CLI-based Snmp freeware to explore the Snmp MIBs Software RequirementsSoftware and Management Systems Purpose OIDs that are useful for operating a dial network Configuration Design Parameters Snmp Network Name Assigned IP Subnet DescriptionNOC Community Strings Purpose ABC Implementation and Operation TasksSupport Contact Phone T1 Dial-in Number Circuit ID Contract DEFPage RFC1213-MIB Dial Related System Management MIB II / InterfacesCISCO-POP-MGMT-MIB OLD-CISCO-CHASSIS Show controllers t1 CommandEquivalent Cisco IOS Call-counters Connect-speeds Variable DescriptionShow modem Show caller Show caller ip Show caller user About Enabling Snmp ` UCD-SNMP Command Purpose Enabling Snmp Changes, environmental variables, and critical device This command enables 14+ other commands for distinctTypes of Snmp traps. Edit this command list to include only ConditionsPage About Using UCD-SNMP UCD-SNMP Installing UCD-SNMP and Downloading Cisco MIBs Exploring Snmp MIBs for Dial Netwo rks Step Serial1/0/00 propPointToPointSerial About Snmp Commander Setting Up Snmp Commander Snmp Commander Tool Basic Dial NMS Implementation Guide Page Task 3-Using Mrtg to Monitor and Graph Traffic Loads About Mrtg CISCO-POP-MGMT-MIB About Selecting Dial OIDsBase MIB and OID Description CISCO-MODEM-MGMT-MIB NAS How to Inspect and Interpret Data Daily Graph DS0s and PPP Sessions in Use Configuration file used to create these graphs is posted at Monthly Graph DS0s and PPP Sessions in Use Creating and Editing a Configuration File Interface Type Syntax Example Example # purpose DS0s and Analog # purpose cpmISDNNoResource and cpmModemNoResource Crontab from any directory # purpose activeDS0s and cvpdnSessionTotal Sending Mrtg Graphs to a Web Server Mrtg Graphs Viewed by Using a Web Browser Page About Syslog Message Type Description Syslog Message Severity Level About NTP About Modem Call Records Web-Based MCR Viewer Enabling NTP on a Cisco IOS Device Setting Up an NTP Client Travis-nas-01show ntp association Server Ntpq -p command Troubleshooting the NTP ClientProblem Solution Specifies the IP address of the syslog server Console errors or logging console warningsEnables logging up to the debug level all eight levels Configuring the Syslog Daemon This example, only the fourth T1 of a T3 card is shown Daemon is not running, no ID is returned Inspecting Syslog Messages in t he Log File Aurora/etc -tail -f /var/log/router.log Generic URL Syntax Description Example Views logs on a File//var/log/router.log Local hostPage About a Web Portal Utility Function Utility Function Building a Device Linker Web Function Formula Example Device Linker Management Troubleshooting a Cisco 2511 Console Connection C2511-oob#clear line tty Enables the router to function as an Http server About Http Access to the CLIUsing Http to Access CLI Commands Uses the AAA facility as an authentication method Formula Example Post the Html page that you created in to a web server Cisco IOS CLI Commander Click on a CLI command and view the command output in a web Output for the Show Caller Command Task 6-Managing IP Addresses by Using DNS About Managing IP Addresses Using Cisco Network Registrar CLI Command s Nrcmd zone 101.21.172.in-addr.arpa. listRR Opt/nwreg2/usrbin/nrcmd zone 101.21.172.in-addr.arpa. listRR Nrcmd zone the.net. addRR bobslake-nas-02 a Following output appears Using a Batch File to Make Changes to a DNS ConfigurationRun the script by using the -b option Creating a Primary Forward Zone Creating an IP Tracker Web IP Tracker Web Host = doc-oob-03.the.net How to Create a Reverse DNS Zone Page Task 7-Using HP OpenView to Create Snmp Framework About HP OpenView Verifying the Snmp Configuration Last message Initialization complete Exit status Object manager name snmpCollect State Snmp Configuration Loopback IP Address and Community Strings Click Add and Apply to submit the entries About Snmp Demand Polls Performing an Snmp Demand Poll Select Network Connectivity Poll Node Field Description You can identify the software version running on the device Testing Snmp Get RequestsConfirms the interfaces were successfully pinged Field Returned Value Description Troubleshooting Snmp and a Demand Poll Verifying that Snmp Traps Are Received Traps in the All Events Browser Unmanaging the Dial Ports Available Interfaces and Ports for a Cisco AS5800 Creating and Adjustin g Maps Select Automatic Layout About Discovery FiltersGo to View Choose Off For This Submap Setting Up and Editing a Discover y Filter TheNetNodes TheNet Node List AS5800-1, AS5800-2 Constituent parts Using the Hpov CLI to Enter a Device into the Database Restart the netmon daemon by entering the following commandsPage CiscoWorks 2000 TAC Support Page -Provides links to About CiscoWorks 2000 RMEReference CiscoWorks 2000 Documentation Set -A collection Importing Devices from Hpov and Popul ating the Databases Select Inventory Import from Local NMS Click Next Devices are imported and a status summary appears To accept the default settings, click Finish Verifying that Device Polling is Turned On Polling the Devices Status of the Devices Inspect the available elements for the devices Select All in the Views windowSelect one or more devices Select one or more devices from the list that appears Backing up Cisco IOS ConfigurationsSelect All Devices Select and view different system components Using CiscoViewGo to Monitor CiscoView Available Modems in the Cisco AS5800 Dial Shelf Page NTP Snmp AAAHttp UCD-SNMP FTP DNSFcaps NTP Ovstop commandOvw& command Incident tracking FAQManaged devices Management Message types and commands MIBs NMS Touch command Troubleshooting HP OpenView NOC POP Index Basic Dial NMS Implementation Guide