Visualizing a network path

A network path view displays every device and link encountered between the start and end devices. Issues affecting devices and links on that path are displayed graphically. You can edit the path view manually by excluding devices from the view. You can retrace a path, or edit it before retracing it. You can also copy a path view to another view container, or delete it.

Before you begin

Before you can work with network paths, the administrator must have successfully completed the first network discovery, and network views must be configured for your user ID.

About this task

You can only edit or retrace IP paths. MPLS TE paths are populated during discovery and cannot be edited or retraced.
Note: MPLS TE paths are displayed by default under the itnmadmin views. This can be altered by editing the $NMGUI_HOME/profile/etc/tnm/topoviz.properties file and changing the values for the following view attributes:
  • topoviz.pathview.accesslevel
  • topoviz.pathview.accessid

Procedure

  1. Click the Incident icon and select Network Availability > Path Views.
    The Path Views window opens. Any network paths that have been created are shown.
  2. To interact with network paths, use the following buttons:
    Views drop-down
    Use to find and display a specific path view. Path views are arranged in a tree structure based on path view container types, for example, 'AUTO', 'IP Paths', 'itnmadmin', or 'Client Views'.
    Each path view displays the view name, the number of hops in the path, and the highest severity alert (if any) associated with that path view.
    Note: You can click the severity icon to launch the Active Event List with that event selected. You can also select a device, and then click Find In Network View or Find In Hop View from the context menu.
    New path New Path button
    Opens the Trace Network Path window, where you can create a new path view.
    Note: IP path views only.
    Note: You can only trace a path across a single domain. All devices specified in the Trace Network Path window must be in the same domain.
    Depending on the user roles set by your administrator for your user ID, you may be able to save the new path to your list of path views.
    Edit path Edit Path button
    Click here to edit a path view that is currently being displayed. The Trace Network Path window opens populated with the details for the path, any of which can be changed. You trace and display the edited path by clicking Save and Trace.
    Note: IP path views only.
    Note: You can only trace a path across a single domain. All devices specified in the Trace Network Path window must be in the same domain.
    Retrace path Retrace Path button
    Click here to retrace the path between the devices in the currently selected path view. Paths between devices in a network are dynamic, and therefore trace results may be different each time a path is retraced.
    Note: IP path views only.
    Copy or move path Copy or Move Path button
    Opens the Copy or Move Path dialog. Use to copy or move a selected path to a different view container.
    Delete path Delete Path button
    Click here to delete the path view that is currently being displayed. If the path view is the last view in a container, the container will be deleted as well.
    Note: The path stored in the NCIM database is not deleted. If any user recreates the deleted path with the same settings, a new trace occurs and the existing path in the NCIM database is updated with the new trace results.
    Toggle search Toggle network view search button
    Displays a search box below the toolbar from which you can search for a view.
    Save Save button
    Saves the view or view container. This button appears only when a view is displayed.
    Save as Image Save as Image button
    Saves the view or views as an image. Displayed only for users with the ncp_printing_allowed role.
    Print Print button
    Prints the view or view container. Displayed only for users with the ncp_printing_allowed role.
    Find in Map Find in Map button
    Searches for a device in the topology map.
    Select Select icon
    Changes the cursor to select mode, which is the default. When the cursor is in select mode, if you click a device in the topology display panel, that device is selected. You can reposition nodes by dragging them using this mode. You can save the position of nodes by using the Save button. The positions of nodes that are not connected to other nodes are not saved, unless this network view or all network views are configured to maintain the position of nodes after rediscovery.
    Pan Pan button
    Changes the cursor to pan mode. When the cursor is in pan mode, the cursor changes to the following icon: Pan cursor icon. Click and hold the left mouse button to grab the topology; you can then use the mouse to move the topology.
    Select Zoom Select Zoom button
    Changes the cursor to select-zoom mode. When the cursor is in select-zoom mode, you can use the mouse to draw a rectangle over a particular area of the topology. When you release the mouse button, the screen zooms in to the rectangle you have drawn.
    Interactive Zoom Interactive Zoom button
    Changes the cursor to interactive-zoom mode. When the cursor is in interactive zoom mode, hold down the mouse button and move the cursor up to zoom out, and while hold down the mouse button and move the cursor down to zoom in.
    Toggle Overview Toggle Overview button
    Displays a thumbnail of the whole view in the bottom right corner, with a box around the region that is currently visible.
    Zoom In Zoom in button
    Zooms in to the view.
    Zoom Out Zoom out button
    Zooms out of the view.
    Fit in Window Fit in Window button
    Fits the current view to the size of the Topology Display window.
    Hierarchical Layout Hierarchical Layout button
    Changes the format of the view to a hierarchical layout. This option is not available for views that cannot contain connectivity information, such as Unassigned network views.
    Symmetric Layout Symmetric Layout button
    Changes the format of the view to a symmetric layout. This option is not available for views that cannot contain connectivity information, such as Unassigned network views.
    Orthogonal Layout Orthogonal Layout button
    Changes the format of the view to an orthogonal layout. This option is not available for views that cannot contain connectivity information, such as Unassigned network views.
    Circular Layout Circular Layout button
    Changes the format of the view to a circular layout. This option is not available for views that cannot contain connectivity information, such as Unassigned network views.
    If you chose to create a new path or retrace an existing path, then Path View window displays the devices resulting from your search.

What to do next

If the path was not successfully traced, then you get a path trace error, indicating the reason that the path could not be traced. To see more detailed path trace output, click the error at the top of the Trace Network Path window. Detailed path trace output opens in a second window. To troubleshoot the path trace, refer to the related information on troubleshooting path views.