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  Launching Path Tracer
Step 3Specify the destination. 
Step 4To limit the number of hops for the path trace, check the Stop trace after check box, and enter the 
maximum number of hops for the path trace.
Step 5Click OK. The Cisco PathTracer window is displayed with the resulting path trace.
Using an IP Interface
Both IPv4 and IPv6 addresses are supported as valid path trace sources and destinations as illustrated in 
the following procedure.
Step 1In logical inventory, right-click the required IP interface (Logical Inventory > Routing 
Entities > Routing Entity >ip-interface).
The right-click menu displays IPv4 and IPv6 options. These options are enabled or dimmed, depending 
on whether the IP interface has an IPv4 address, an IPv6 address, or both IPv4 and IPv6 addresses. See 
Figure 13-3. 
Figure 13-3 IP Interface Path Trace Launch Point - Right-Click Menu
Step 2
Choose PathTracer > From Here to Destination. The Path Information dialog box is displayed as 
shown in Figure 13-4. 
						

							  
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Figure 13-4 IP Interface Path Trace Launch Point - Path Information Dialog Box
Step 3
In the Destination IP field, enter the IPv4 or IPv6 address. 
Step 4To limit the number of hops for the path trace, check the Stop trace after check box, and enter the 
maximum number of hops for the path trace.
Step 5Click OK. 
Using a VLAN Bridge
You can launch path traces from VLAN bridges. Additionally, MAC addresses in the VLAN bridge 
forwarding table can be path trace destinations. 
Step 1In logical inventory, right-click the required bridge (Logical Inventory > Bridges >bridge) and choose 
one of the following options as shown in Figure 13-5: 
PathTracer > From Here to Destination 
PathTracer > Start Here  
						

							  
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Figure 13-5 VLAN Bridge Path Trace Launch Point
Step 2
If you choose From Here to Destination in Step 1, the Path Information dialog box is displayed. 
Specify the required destination.
Step 3If you choose Start Here, navigate to the destination, right-click it, and choose End Here. Destination 
options include: 
IP interface—Logical Inventory > Routing Entities > Routing Entity >IP-interface
Bridge—Logical Inventory > Bridges >bridge
MAC address—Logical Inventory > Bridges >bridge> Bridge Table >MAC-address 
Ethernet port—Physical Inventory >chassis>slot>port 
When a destination is selected, the system extracts the relevant IP address from this point and uses it as 
the destination.
Using an Ethernet Port
To launch a path trace from an Ethernet port: 
Step 1In physical inventory, right-click the required port (Physical 
Inventory > Chassis >slot>subslot>port) and choose one of the following options as shown in 
Figure 13-6:
PathTracer > From Here to Destination 
PathTracer > Start Here  
						

							  
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Figure 13-6 Ethernet Port Path Trace Launch Point 
Step 2
Depending on your choice in Step 1, specify the required destination information or select the path trace 
endpoint. 
The Cisco PathTracer window appears, displaying the resulting path trace.
Using a Pseudowire
To launch a path trace from a network pseudowire endpoint: 
Step 1In the navigation pane or map pane, expand the required network pseudowire. 
Step 2Right-click the required pseudowire endpoint and choose PathTracer > From Here to Destination. 
The Path Information dialog box is displayed as shown in Figure 13-7.  
						

							  
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Figure 13-7 Path Information Dialog Box for a Network Pseudowire
Step 3
Specify the destination. 
Step 4To limit the number of hops for the path trace, check the Stop trace after check box, and enter the 
maximum number of hops for the path trace.
The Cisco PathTracer window appears, displaying the resulting path trace.
Using an MPLS-TP Tunnel Endpoint
To launch a path trace from an MPLS-TP tunnel endpoint: 
Step 1In the navigation pane or map pane, expand the required MPLS-TP tunnel. 
Step 2Right-click the required MPLS-TP tunnel endpoint and choose PathTracer > From Here to 
Destination. 
The Path Information dialog box is displayed as shown in Figure 13-8.  
						

							  
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Figure 13-8 MPLS-TP Tunnel Endpoint Path Trace Launch
Step 3
Specify the destination. 
Step 4To limit the number of hops for the path trace, check the Stop trace after check box, and enter the 
maximum number of hops for the path trace.
The Cisco PathTracer window appears, displaying the resulting path trace.
Viewing Path Traces
The Cisco PathTracer window displays all discovered paths for the specified source and destination of 
the path trace, including the devices and physical links. Form the window you can:
View multiple paths for a selected source and destination either sequentially or simultaneously.
View individual paths with networking layer details.
Save a map with multiple paths to a file.
Run Cisco PathTracer again, using the same trace or with a different limit number of hops. 
						

							  
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Figure 13-9 shows an example of the Cisco PathTracer window with a multiple-path trace.
Figure 13-9 Cisco PathTracer Window - Multiple-Path Trace
Window 
Area Description
1Menu bar —
2ToolbarCisco PathTracer Toolbar, page 13-16
3Trace tab Displays the discovered path with a tab that displays the date and time when Prime 
Network started the path tracing process (snapshot time). New runs are represented 
in new tabs. To use a saved path in the same window, the source and destination must 
be the same.
4Paths pan Lists all the paths discovered in the path trace (one path for each source and 
destination pair, identified by a number). If you launch a path trace with a specific 
hop count, the paths pane displays First n Hops where n is the number of hops 
specified. You can choose different paths in the path pane or by using the toolbar 
icons. Click Clear Path Selection to de-select a path.
5Status bar —
6Path trace 
paneDisplays the devices, links, and topological paths in path trace. All links and nodes 
are labeled with their relevant path numbers. The starting point is labeled with a 
Starting Point callout. All other edge points are displayed as clouds. The same 
coloring conventions that are used for links in the Prime Network content pane are 
used to display links in the Cisco PathTracer path trace pane. (See Links, 
page A-11.) 
						

							  
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Click PathTracer from the toolbar to display the following information:
Each NE’s relevant parameters for each interface on all layers along the path; for each layer, an 
indication of a mismatch between the parameters of the interfaces on both sides of a link; and traffic 
statistics along the path.
Status and traffic information for all links along the path.
View In and Out port properties. 
If you select multiple paths, a separate window is opened for each path. Figure 13-10 shows an example 
of the Cisco PathTracer details window. 
Figure 13-10 Cisco PathTracer Details Window 
						

							  
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1Menu bar —
2Toolbar —
3Path trace pane Displays information related to the selected tab (for example, Layer 2). If you 
choose an element or link in the path trace pane, the related parameters are 
highlighted in the details pane. By default, the path trace pane includes:
Edge points
Elements included in the path trace, including badges
Links included in the path trace
Hovering your mouse over an element displays a tooltip that contains the 
element name, device type, and IP address. Hovering your mouse over the link 
to the right or left of the element displays the associated incoming or outgoing 
interface for that element and link. 
4Hide/display 
path trace pane—
5Details pane Selecting a device or link in the path trace pane automatically highlights the 
related parameters in the details pane.
Displays information about device or link selected in Path trace pane, such as 
Layer and Business tabs, supported parameters of the selected element in a table, 
with the ingress and egress ports along the top and the parameters on the left.
Colors indicate any inconsistencies between the two connected ports.
The information parameters are arranged as follows:
Layer n tabs—Provide information about each network element, including 
ingress and egress port information. The information is either plain data that 
is extracted from the element or calculated data, such as rates or statistics. 
This information is displayed in the Layer 1, Layer 2, and Layer 3 tabs, as 
follows: 
–Layer 1—Displays the Layer 1 information in the selected path and the 
link parameters, device name, subslot, slot, and port details. 
–Layer 2—Displays the Layer 2 information in the selected path and the 
link and connection parameters. For each device, the name and MAC 
address are displayed, as well as the VPI/VCI in an ATM link or the 
DLCI in a Frame Relay link. (This tab is active by default.). 
–Layer 3—Displays the Layer 3 information in the selected path and the 
link parameters and devicenames.
Fields are only displayed if they are populated. For example, if none of the 
interfaces is configured for MTU, the MTU row is not displayed in the table. 
Business tab—Provides the name and key of business tags that are attached 
to the network entities displayed, including ports, devices (physical 
entities), VCIs, VPIs, DLCIs, contexts (logical entities), or MPLS. 
6Layer and 
Business tabs—
7Status bar — 
						

							  
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Cisco PathTracer Toolbar
Table 13-2 describes the options available in the Cisco PathTracer toolbar. 
Table 13-2 Cisco PathTracer Toolbar Options
Button Function
Displays the previous path in the path trace pane.
Displays the next path in the path trace pane.
Clears the path selection made in the path trace pane.
Opens the Cisco PathTracer details window. A map is displayed for the selected path, 
including network element details, links, and property information. For more information, 
see Saving and Opening Cisco PathTracer Map Files, page 13-17.
Saves the current multiple-path trace to an XML file on your local system. For more 
information, see Saving and Opening Cisco PathTracer Map Files, page 13-17.
Offers the following options for running Cisco PathTracer again for the same source and 
destination:
Change Hop Count—Enables you to enter a new hop count. 
Repeat Last Trace—Runs the previous trace with the same settings. 
Run Full Path Trace—Runs the previous trace without a hop count limit.
The new path trace map is displayed in the path trace pane. 
A new tab with the up-to-date (or refreshed) path map is created for each run, with each tab 
representing a run and the tab label indicating the snapshot time.
Opens a window displaying a high level view of the path trace currently displayed in the 
path trace pane.
Specifies how the elements are arranged in the path trace pane: circular, hierarchical, 
orthogonal, or symmetric.
Fits the entire path trace in the path trace pane.
Activates the normal selection mode. The button toggles when selected or deselected.
Activates the zoom selection mode, which enables you to select a specific area in the path 
to zoom in on by clicking and dragging. The button toggles when selected or deselected.
Activates the pan mode, which enables you to move around in the path trace by clicking and 
dragging. The button toggles when selected or deselected.