Diagnosing network problems

Diagnose network problems using the network troubleshooting tools available in Network Manager.

Investigating faulty devices
You can perform a range of diagnosis tasks on devices and subnets. You can show related network events. You can also drill into faulty network devices, display SNMP MIB values, log into the faulty devices, and investigate the routes to devices.
Investigating events
Use features of the Event Viewer to support network troubleshooting. You can use the Event Viewer to show affected network devices, identify root-cause events, and identify events that have a major service impact.
Investigating network connections
Investigate network connections, trace routes, and create paths in order to check connectivity within your network.
Retrieving device information
Retrieving device information provides important information on the devices in your network to support troubleshooting. Device information includes device configuration information, domain information, and detailed interface, protocol, and routing information.
Displaying poll data from a topology view by using the Top Performers widget
Users can display historical poll data from a topology view to diagnose network problems.
Investigating the health of device components
Investigate the health of device components in order to isolate the fault within a network device.
Showing device connectivity
Run this command on a device in the network map to see the interfaces on that device and associated connections for each interface. The command retrieves connections that are on the same layer as the view from which the command was launched.
Retrieving MIB information
Retrieve MIB variable information from network devices to diagnose network problems.
Graphing MIB variables
You can display a real-time graph of MIB variables for a device and use the graph for fault analysis and resolution of network problems.

Parent topic: Troubleshooting network problems