NETGEAR NMS100 manual Troubleshooting Network Discovery, Duration of Network Discovery

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Chapter 5 Troubleshooting and Advanced Configuration

Troubleshooting Network Discovery

Duration of Network Discovery

During the ProSafe NMS Server installation you entered the address, netmask, and community name for one SNMP V1 discovery seed device. This is normally enough information to discover most of your network. When you first start ProSafe NMS it will take several minutes for discovery to start adding objects to the map. Use the Root Subnet button to display the top-level Map view.

If you used the Disable Discovery on Startup option of the installation, discovery will not be running when you first start ProSafe NMS. In this case, you need to set discovery filters before proceeding. Please refer to “Limiting the Scope of Discovery” on page 6-5before reading this section.

Normal Discovery Map Layout

Discovery creates a two-level IP Subnet based topology. At the top-level, discovery adds any multi-port devices (routers) and subnet icons for each IP Subnet. Link objects are added between each router and the subnets it is connected to. The map is automatically arranged in a star configuration.

All single-port SNMP devices and ICMP (Ping) devices are added to the second level under each subnet icon, based on the device IP address and subnet mask. A single Bus Network is added to each subnet level, and all devices in the subnet are linked to this network.

Use the Root Subnet button to display the top-level Map view. You should see a mixture of SNMP device icons and subnet icons, connected by links in a star configuration. Double-click on one of the subnet icons. You should see a Bus Network with devices linked to it in a grid configuration.

Troubleshooting and Advanced Configuration

5-1

September 2004 202-10058-01

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Contents NETGEAR, Inc September 2004Statement of Conditions TrademarksCustomer Support World Wide Web Contents Chapter Data and Statistics Appendix a Contents Typographical Conventions Audience, Scope, Conventions, and FormatsManual Scope Overview Other ProSafe NMS FeaturesProSafe Network Management System Device Access ModesSystem Requirements Recommended system requirementsPackage Contents Introduction Introduction Installing the ProSafe NMS Server and Local Console Chapter Installation and StartupStarting the ProSafe NMS Server and Local Console Installing the Air Messenger Pro Paging SoftwareStarting a Local Console Session Disabling Automatic Console LoginStopping and Starting the Server Main button bar Edit button bar Selection Tool Console ElementsEvent Log Tool Element FunctionZoom to Console Button CommandsEvent Log Tool Selection ToolSelection Tool tabs Selection Tab DescriptionView Window Area Installation and Startup Map Selection Tree Working with the Map DatabaseView All Zoom Out Using Map View WindowsZoom RectangleMoving Objects at the Root Level Moving Map ObjectsAutomatically arranged and manually arranged submap levels Moving Objects Inside Subnet LevelsMoving Objects from One Subnet to Another Attributes Changing Object PropertiesObject Properties Access tab Access ParametersAttribute Name Description Type-Dependent Attributes Object Attribute Name Description Type a Object Properties Attribute tabObject Types Adding Map ObjectsType Description MIB Selection Tree Viewing Device MIB DataManage Menus Custom Menus Table Display ElementsGraph Styles Graph Display ElementsCreating a New Report Saving Long-term StatisticsViewing Trend Data in a Graph Window Limiting Saved Instances Threshold Alarms Setting Threshold AlarmsAlarm Type Description Configuring Automatic Alarms Setting Status Variable PollingSetting Manual Threshold Alarms Discovery of Four Built-in Services Polling TCP Application ServicesTCP Service Polling Managing Polling for the Device Custom TCP Service PollingTo modify an existing Custom TCP Service definition Emailing or Paging the Administrator on an EventThen, set the Email/Paging global event options Add an Event Filter for the pollDeviceDown event Then, set the Email/Page event actions ProSafe NMS Events Other Event TypesEvent Subtree Trap Name Description First, add a grouped set of users Emailing or Paging Multiple UsersThen, add an Event Filter for the selected devices Duration of Network Discovery Troubleshooting Network DiscoveryNormal Discovery Map Layout Sample top-level and Subnet Map views for a small network Failure Symptoms and SolutionsIncorrect or Missing Community Names Discovery Agent Fails to Connect to the ServerFirewalls Block Snmp Operations Snmp Device Access Control ListNot Enough Seeds Broadcast Packet Losses Setting Up New FiltersLimiting the Scope of Discovery Stopping Discovery Auto-Layout Event Parameters Event ParametersEvent Description Parameters Set Community name of the target device List of Glossary Terms Auto Uplink Denial of Service attackCat Domain Name DoS Dynamic Host Configuration ProtocolIP Address GatewayInternet Protocol Local area network Lightweight Directory Access ProtocolMAC address MbpsNetwork Address Translation NetBIOSPacket Perfect Forward SecrecyPPP over ATM PPPoEPPP over Ethernet RouterSubnet Mask Universal Plug and Play Wi-Fi Windows Internet Naming ServiceWEB Proxy Server Wide area networkWireless Network Name Ssid Index Index Index